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152871971 = 721838853
BaseRepresentation
bin10010001110010…
…10010000100011
3101122122200220212
421013022100203
5303113400341
623100324335
73534250610
oct1107122043
9348580825
10152871971
1179323a7a
12432436ab
13258961b5
1416435507
15d64a5eb
hex91ca423

152871971 has 4 divisors (see below), whose sum is σ = 174710832. Its totient is φ = 131033112.

The previous prime is 152871941. The next prime is 152871991. The reversal of 152871971 is 179178251.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 152871971 - 214 = 152855587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (152871911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10919420 + ... + 10919433.

It is an arithmetic number, because the mean of its divisors is an integer number (43677708).

Almost surely, 2152871971 is an apocalyptic number.

152871971 is a deficient number, since it is larger than the sum of its proper divisors (21838861).

152871971 is an equidigital number, since it uses as much as digits as its factorization.

152871971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21838860.

The product of its digits is 35280, while the sum is 41.

The square root of 152871971 is about 12364.1405281564. The cubic root of 152871971 is about 534.6988971535.

The spelling of 152871971 in words is "one hundred fifty-two million, eight hundred seventy-one thousand, nine hundred seventy-one".

Divisors: 1 7 21838853 152871971