56228139 has 12 divisors (see below), whose sum is σ = 88602072. Its totient is φ = 34077600.

The previous prime is 56228119. The next prime is 56228147. The reversal of 56228139 is 93182265.

It is not a de Polignac number, because 56228139 - 2²¹ = 54130987 is a prime.

It is a super-3 number, since 3×56228139³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (56228119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 283882 + ... + 284079.

It is an arithmetic number, because the mean of its divisors is an integer number (7383506).

Almost surely, 2^56228139 is an apocalyptic number.

56228139 is a deficient number, since it is larger than the sum of its proper divisors (32373933).

56228139 is a wasteful number, since it uses less digits than its factorization.

56228139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567978 (or 567975 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 56228139 is about 7498.5424583715. The cubic root of 56228139 is about 383.1050733489.

The spelling of 56228139 in words is "fifty-six million, two hundred twenty-eight thousand, one hundred thirty-nine".