87257031 has 8 divisors (see below), whose sum is σ = 117495024. Its totient is φ = 57595200.

The previous prime is 87257017. The next prime is 87257041. The reversal of 87257031 is 13075278.

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

It is not a de Polignac number, because 87257031 - 2¹³ = 87248839 is a prime.

It is a super-2 number, since 2×87257031² = 15227578917869922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 87256983 and 87257001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87257041) 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 7 ways as a sum of consecutive naturals, for example, 143686 + ... + 144291.

It is an arithmetic number, because the mean of its divisors is an integer number (14686878).

Almost surely, 2^87257031 is an apocalyptic number.

87257031 is a deficient number, since it is larger than the sum of its proper divisors (30237993).

87257031 is a wasteful number, since it uses less digits than its factorization.

87257031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288081.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 87257031 is about 9341.1471993540. The cubic root of 87257031 is about 443.5406996565.

The spelling of 87257031 in words is "eighty-seven million, two hundred fifty-seven thousand, thirty-one".