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157157157 = 3157333667
BaseRepresentation
bin10010101111000…
…00011100100101
3101221201102002110
421113200130211
5310213012112
623332231233
73615546063
oct1127403445
9357642073
10157157157
1180790553
124476b519
1326736801
1416c2d033
15dbe513c
hex95e0725

157157157 has 8 divisors (see below), whose sum is σ = 210878176. Its totient is φ = 104103792.

The previous prime is 157157087. The next prime is 157157159. The reversal of 157157157 is 751751751.

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

It is not a de Polignac number, because 157157157 - 215 = 157124389 is a prime.

It is a Duffinian number.

157157157 is a modest number, since divided by 157157 gives 157 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157157159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166363 + ... + 167304.

It is an arithmetic number, because the mean of its divisors is an integer number (26359772).

Almost surely, 2157157157 is an apocalyptic number.

It is an amenable number.

157157157 is a deficient number, since it is larger than the sum of its proper divisors (53721019).

157157157 is a wasteful number, since it uses less digits than its factorization.

157157157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333827.

The product of its digits is 42875, while the sum is 39.

The square root of 157157157 is about 12536.2337645722. The cubic root of 157157157 is about 539.6490140301.

The spelling of 157157157 in words is "one hundred fifty-seven million, one hundred fifty-seven thousand, one hundred fifty-seven".

Divisors: 1 3 157 471 333667 1001001 52385719 157157157