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157655481 = 379665213
BaseRepresentation
bin10010110010110…
…10000110111001
3101222122201122220
421121122012321
5310324433411
623351034253
73623022654
oct1131320671
9358581586
10157655481
1180aa0995
124496b989
132687c589
1416d1c89b
15dc92b06
hex965a1b9

157655481 has 8 divisors (see below), whose sum is σ = 212868480. Its totient is φ = 103773072.

The previous prime is 157655479. The next prime is 157655507. The reversal of 157655481 is 184556751.

157655481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 157655481 - 21 = 157655479 is a prime.

It is a super-2 number, since 2×1576554812 = 49710501378682722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (157655431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332370 + ... + 332843.

It is an arithmetic number, because the mean of its divisors is an integer number (26608560).

Almost surely, 2157655481 is an apocalyptic number.

It is an amenable number.

157655481 is a deficient number, since it is larger than the sum of its proper divisors (55212999).

157655481 is an equidigital number, since it uses as much as digits as its factorization.

157655481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665295.

The product of its digits is 168000, while the sum is 42.

The square root of 157655481 is about 12556.0933813030. The cubic root of 157655481 is about 540.2187967956.

The spelling of 157655481 in words is "one hundred fifty-seven million, six hundred fifty-five thousand, four hundred eighty-one".

Divisors: 1 3 79 237 665213 1995639 52551827 157655481