87162557 has 4 divisors (see below), whose sum is σ = 91750080. Its totient is φ = 82575036.

The previous prime is 87162503. The next prime is 87162601. The reversal of 87162557 is 75526178.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87162557 - 2²² = 82968253 is a prime.

It is a super-2 number, since 2×87162557² = 15194622685556498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87162857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2293733 + ... + 2293770.

It is an arithmetic number, because the mean of its divisors is an integer number (22937520).

Almost surely, 2^87162557 is an apocalyptic number.

It is an amenable number.

87162557 is a deficient number, since it is larger than the sum of its proper divisors (4587523).

87162557 is a wasteful number, since it uses less digits than its factorization.

87162557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4587522.

The product of its digits is 117600, while the sum is 41.

The square root of 87162557 is about 9336.0889563028. The cubic root of 87162557 is about 443.3805666348.

The spelling of 87162557 in words is "eighty-seven million, one hundred sixty-two thousand, five hundred fifty-seven".