55507904 has 28 divisors (see below), whose sum is σ = 110392464. Its totient is φ = 27692544.

The previous prime is 55507889. The next prime is 55507913. The reversal of 55507904 is 40970555.

It is a super-2 number, since 2×55507904² = 6162254812946432, which contains 22 as substring.

It is a congruent number.

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, 45932 + ... + 47124.

It is an arithmetic number, because the mean of its divisors is an integer number (3942588).

Almost surely, 2^55507904 is an apocalyptic number.

It is an amenable number.

55507904 is a deficient number, since it is larger than the sum of its proper divisors (54884560).

55507904 is a wasteful number, since it uses less digits than its factorization.

55507904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1932 (or 1922 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 35.

The square root of 55507904 is about 7450.3626757360. The cubic root of 55507904 is about 381.4622881497.

The spelling of 55507904 in words is "fifty-five million, five hundred seven thousand, nine hundred four".