55907817 has 16 divisors (see below), whose sum is σ = 85303680. Its totient is φ = 31905792.

The previous prime is 55907809. The next prime is 55907833. The reversal of 55907817 is 71870955.

It is not a de Polignac number, because 55907817 - 2³ = 55907809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55907897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23059 + ... + 25367.

It is an arithmetic number, because the mean of its divisors is an integer number (5331480).

Almost surely, 2^55907817 is an apocalyptic number.

It is an amenable number.

55907817 is a deficient number, since it is larger than the sum of its proper divisors (29395863).

55907817 is a wasteful number, since it uses less digits than its factorization.

55907817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3472.

The product of its (nonzero) digits is 88200, while the sum is 42.

The square root of 55907817 is about 7477.1530009757. The cubic root of 55907817 is about 382.3761930034.

The spelling of 55907817 in words is "fifty-five million, nine hundred seven thousand, eight hundred seventeen".