55639224 has 48 divisors (see below), whose sum is σ = 156276120. Its totient is φ = 18545760.

The previous prime is 55639217. The next prime is 55639247. The reversal of 55639224 is 42293655.

55639224 is a `hidden beast` number, since 5 + 563 + 92 + 2 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12367 + ... + 16254.

Almost surely, 2^55639224 is an apocalyptic number.

55639224 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

55639224 is an abundant number, since it is smaller than the sum of its proper divisors (100636896).

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

55639224 is a wasteful number, since it uses less digits than its factorization.

55639224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28642 (or 28626 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 55639224 is about 7459.1704632620. The cubic root of 55639224 is about 381.7628710232.

The spelling of 55639224 in words is "fifty-five million, six hundred thirty-nine thousand, two hundred twenty-four".