87855031 has 32 divisors (see below), whose sum is σ = 108518400. Its totient is φ = 70087680.

The previous prime is 87855011. The next prime is 87855037. The reversal of 87855031 is 13055878.

It is a cyclic number.

It is not a de Polignac number, because 87855031 - 2⁵ = 87854999 is a prime.

It is a super-2 number, since 2×87855031² = 15437012944021922, 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 (87855037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 280531 + ... + 280843.

It is an arithmetic number, because the mean of its divisors is an integer number (3391200).

Almost surely, 2^87855031 is an apocalyptic number.

87855031 is a deficient number, since it is larger than the sum of its proper divisors (20663369).

87855031 is a wasteful number, since it uses less digits than its factorization.

87855031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 87855031 is about 9373.1014610960. The cubic root of 87855031 is about 444.5516352545.

The spelling of 87855031 in words is "eighty-seven million, eight hundred fifty-five thousand, thirty-one".