55712238 has 16 divisors (see below), whose sum is σ = 111749760. Its totient is φ = 18516536.

The previous prime is 55712231. The next prime is 55712243. The reversal of 55712238 is 83221755.

It is a junction number, because it is equal to n+sod(n) for n = 55712199 and 55712208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55712231) 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, 11298 + ... + 15461.

It is an arithmetic number, because the mean of its divisors is an integer number (6984360).

Almost surely, 2^55712238 is an apocalyptic number.

55712238 is an abundant number, since it is smaller than the sum of its proper divisors (56037522).

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

55712238 is a wasteful number, since it uses less digits than its factorization.

55712238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27111.

The product of its digits is 16800, while the sum is 33.

The square root of 55712238 is about 7464.0631026271. The cubic root of 55712238 is about 381.9297907388.

The spelling of 55712238 in words is "fifty-five million, seven hundred twelve thousand, two hundred thirty-eight".