55945272 has 64 divisors (see below), whose sum is σ = 149184000. Its totient is φ = 17432064.

The previous prime is 55945261. The next prime is 55945301. The reversal of 55945272 is 27254955.

It is a self number, because there is not a number n which added to its sum of digits gives 55945272.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35248 + ... + 36800.

It is an arithmetic number, because the mean of its divisors is an integer number (2331000).

Almost surely, 2^55945272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55945272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74592000).

55945272 is an abundant number, since it is smaller than the sum of its proper divisors (93238728).

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

55945272 is a wasteful number, since it uses less digits than its factorization.

55945272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660 (or 1656 counting only the distinct ones).

The product of its digits is 126000, while the sum is 39.

The square root of 55945272 is about 7479.6572113968. The cubic root of 55945272 is about 382.4615639109.

The spelling of 55945272 in words is "fifty-five million, nine hundred forty-five thousand, two hundred seventy-two".