55972238 has 16 divisors (see below), whose sum is σ = 97580160. Its totient is φ = 23581176.

The previous prime is 55972237. The next prime is 55972243. The reversal of 55972238 is 83227955.

It is a junction number, because it is equal to n+sod(n) for n = 55972195 and 55972204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55972237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33056 + ... + 34707.

It is an arithmetic number, because the mean of its divisors is an integer number (6098760).

Almost surely, 2^55972238 is an apocalyptic number.

55972238 is a deficient number, since it is larger than the sum of its proper divisors (41607922).

55972238 is a wasteful number, since it uses less digits than its factorization.

55972238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67831.

The product of its digits is 151200, while the sum is 41.

The square root of 55972238 is about 7481.4596169464. The cubic root of 55972238 is about 382.5230037285.

The spelling of 55972238 in words is "fifty-five million, nine hundred seventy-two thousand, two hundred thirty-eight".