55291624 has 16 divisors (see below), whose sum is σ = 103821120. Its totient is φ = 27606000.

The previous prime is 55291619. The next prime is 55291637. The reversal of 55291624 is 42619255.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 55291624.

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, 1407 + ... + 10609.

It is an arithmetic number, because the mean of its divisors is an integer number (6488820).

Almost surely, 2^55291624 is an apocalyptic number.

It is an amenable number.

55291624 is a deficient number, since it is larger than the sum of its proper divisors (48529496).

55291624 is a wasteful number, since it uses less digits than its factorization.

55291624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9960 (or 9956 counting only the distinct ones).

The product of its digits is 21600, while the sum is 34.

The square root of 55291624 is about 7435.8337797452. The cubic root of 55291624 is about 380.9662023418.

The spelling of 55291624 in words is "fifty-five million, two hundred ninety-one thousand, six hundred twenty-four".