55042372 has 48 divisors (see below), whose sum is σ = 120903552. Its totient is φ = 21300480.

The previous prime is 55042367. The next prime is 55042397. The reversal of 55042372 is 27324055.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 55042372.

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, 52768 + ... + 53800.

It is an arithmetic number, because the mean of its divisors is an integer number (2518824).

Almost surely, 2^55042372 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 55042372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60451776).

55042372 is an abundant number, since it is smaller than the sum of its proper divisors (65861180).

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

55042372 is a wasteful number, since it uses less digits than its factorization.

55042372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228 (or 1226 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 55042372 is about 7419.0546567605. The cubic root of 55042372 is about 380.3928808270.

The spelling of 55042372 in words is "fifty-five million, forty-two thousand, three hundred seventy-two".