55381372 has 12 divisors (see below), whose sum is σ = 96971616. Its totient is φ = 27675200.

The previous prime is 55381357. The next prime is 55381379. The reversal of 55381372 is 27318355.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55381379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8733 + ... + 13675.

It is an arithmetic number, because the mean of its divisors is an integer number (8080968).

Almost surely, 2^55381372 is an apocalyptic number.

It is an amenable number.

55381372 is a deficient number, since it is larger than the sum of its proper divisors (41590244).

55381372 is a wasteful number, since it uses less digits than its factorization.

55381372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7748 (or 7746 counting only the distinct ones).

The product of its digits is 25200, while the sum is 34.

The square root of 55381372 is about 7441.8661638060. The cubic root of 55381372 is about 381.1722158969.

The spelling of 55381372 in words is "fifty-five million, three hundred eighty-one thousand, three hundred seventy-two".