55621724 has 6 divisors (see below), whose sum is σ = 97338024. Its totient is φ = 27810860.

The previous prime is 55621711. The next prime is 55621733. The reversal of 55621724 is 42712655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6952712 + ... + 6952719.

It is an arithmetic number, because the mean of its divisors is an integer number (16223004).

Almost surely, 2^55621724 is an apocalyptic number.

It is an amenable number.

55621724 is a deficient number, since it is larger than the sum of its proper divisors (41716300).

55621724 is a wasteful number, since it uses less digits than its factorization.

55621724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13905435 (or 13905433 counting only the distinct ones).

The product of its digits is 16800, while the sum is 32.

The square root of 55621724 is about 7457.9973183154. The cubic root of 55621724 is about 381.7228420034.

The spelling of 55621724 in words is "fifty-five million, six hundred twenty-one thousand, seven hundred twenty-four".