55239715 has 8 divisors (see below), whose sum is σ = 70187040. Its totient is φ = 41592192.

The previous prime is 55239697. The next prime is 55239761. The reversal of 55239715 is 51793255.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55239715 - 2⁹ = 55239203 is a prime.

It is a super-2 number, since 2×55239715² = 6102852226562450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324855 + ... + 325024.

It is an arithmetic number, because the mean of its divisors is an integer number (8773380).

Almost surely, 2^55239715 is an apocalyptic number.

55239715 is a deficient number, since it is larger than the sum of its proper divisors (14947325).

55239715 is a wasteful number, since it uses less digits than its factorization.

55239715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649901.

The product of its digits is 47250, while the sum is 37.

The square root of 55239715 is about 7432.3424974903. The cubic root of 55239715 is about 380.8469451802.

The spelling of 55239715 in words is "fifty-five million, two hundred thirty-nine thousand, seven hundred fifteen".