55621624 has 16 divisors (see below), whose sum is σ = 104431320. Its totient is φ = 27773280.

The previous prime is 55621561. The next prime is 55621627. The reversal of 55621624 is 42612655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55621627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2202 + ... + 10774.

Almost surely, 2^55621624 is an apocalyptic number.

It is an amenable number.

55621624 is a deficient number, since it is larger than the sum of its proper divisors (48809696).

55621624 is a wasteful number, since it uses less digits than its factorization.

55621624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9390 (or 9386 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The square root of 55621624 is about 7457.9906140998. The cubic root of 55621624 is about 381.7226132420.

The spelling of 55621624 in words is "fifty-five million, six hundred twenty-one thousand, six hundred twenty-four".