55807556 has 12 divisors (see below), whose sum is σ = 111615168. Its totient is φ = 23917512.

The previous prime is 55807489. The next prime is 55807567. The reversal of 55807556 is 65570855.

55807556 is an admirable number.

It is a super-2 number, since 2×55807556² = 6228966613386272, which contains 22 as substring.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

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, 996536 + ... + 996591.

It is an arithmetic number, because the mean of its divisors is an integer number (9301264).

Almost surely, 2^55807556 is an apocalyptic number.

It is an amenable number.

55807556 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55807556 is a wasteful number, since it uses less digits than its factorization.

55807556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993138 (or 1993136 counting only the distinct ones).

The product of its (nonzero) digits is 210000, while the sum is 41.

The square root of 55807556 is about 7470.4455021103. The cubic root of 55807556 is about 382.1474810416.

The spelling of 55807556 in words is "fifty-five million, eight hundred seven thousand, five hundred fifty-six".