55239534 has 24 divisors (see below), whose sum is σ = 136783920. Its totient is φ = 15782688.

The previous prime is 55239529. The next prime is 55239607. The reversal of 55239534 is 43593255.

It is a super-2 number, since 2×55239534² = 6102812233074312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 219079 + ... + 219330.

It is an arithmetic number, because the mean of its divisors is an integer number (5699330).

Almost surely, 2^55239534 is an apocalyptic number.

55239534 is an abundant number, since it is smaller than the sum of its proper divisors (81544386).

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

55239534 is a wasteful number, since it uses less digits than its factorization.

55239534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438424 (or 438421 counting only the distinct ones).

The product of its digits is 81000, while the sum is 36.

The square root of 55239534 is about 7432.3303209693. The cubic root of 55239534 is about 380.8465292152.

The spelling of 55239534 in words is "fifty-five million, two hundred thirty-nine thousand, five hundred thirty-four".