55322372 has 36 divisors (see below), whose sum is σ = 116515980. Its totient is φ = 22889664.

The previous prime is 55322339. The next prime is 55322387. The reversal of 55322372 is 27322355.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 39513796 + 15808576 = 6286^2 + 3976^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

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, 818 + ... + 10550.

It is an arithmetic number, because the mean of its divisors is an integer number (3236555).

Almost surely, 2^55322372 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 55322372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58257990).

55322372 is an abundant number, since it is smaller than the sum of its proper divisors (61193608).

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

55322372 is a wasteful number, since it uses less digits than its factorization.

55322372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9780 (or 9771 counting only the distinct ones).

The product of its digits is 12600, while the sum is 29.

The square root of 55322372 is about 7437.9010480108. The cubic root of 55322372 is about 381.0368084434.

The spelling of 55322372 in words is "fifty-five million, three hundred twenty-two thousand, three hundred seventy-two".