91556 has 12 divisors (see below), whose sum is σ = 163968. Its totient is φ = 44712.

The previous prime is 91541. The next prime is 91571. The reversal of 91556 is 65519.

91556 = 19² + 20² + ... + 65².

It is an interprime number because it is at equal distance from previous prime (91541) and next prime (91571).

It is a super-2 number, since 2×91556² = 16765002272, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 91556.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56 + ... + 431.

It is an arithmetic number, because the mean of its divisors is an integer number (13664).

2⁹¹⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

91556 is a deficient number, since it is larger than the sum of its proper divisors (72412).

91556 is a wasteful number, since it uses less digits than its factorization.

91556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538 (or 536 counting only the distinct ones).

The product of its digits is 1350, while the sum is 26.

The square root of 91556 is about 302.5822202311. The cubic root of 91556 is about 45.0708349416.

The spelling of 91556 in words is "ninety-one thousand, five hundred fifty-six".