54139215 has 16 divisors (see below), whose sum is σ = 93286368. Its totient is φ = 26653056.

The previous prime is 54139213. The next prime is 54139223. The reversal of 54139215 is 51293145.

It is not a de Polignac number, because 54139215 - 2¹ = 54139213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54139213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138624 + ... + 139013.

It is an arithmetic number, because the mean of its divisors is an integer number (5830398).

Almost surely, 2^54139215 is an apocalyptic number.

54139215 is a deficient number, since it is larger than the sum of its proper divisors (39147153).

54139215 is a wasteful number, since it uses less digits than its factorization.

54139215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277658.

The product of its digits is 5400, while the sum is 30.

The square root of 54139215 is about 7357.9355120849. The cubic root of 54139215 is about 378.3008508837.

The spelling of 54139215 in words is "fifty-four million, one hundred thirty-nine thousand, two hundred fifteen".