55239492 has 96 divisors (see below), whose sum is σ = 162054144. Its totient is φ = 14227200.

The previous prime is 55239473. The next prime is 55239493. The reversal of 55239492 is 29493255.

It is a self number, because there is not a number n which added to its sum of digits gives 55239492.

It is not an unprimeable number, because it can be changed into a prime (55239493) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 176328 + ... + 176640.

It is an arithmetic number, because the mean of its divisors is an integer number (1688064).

Almost surely, 2^55239492 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55239492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81027072).

55239492 is an abundant number, since it is smaller than the sum of its proper divisors (106814652).

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

55239492 is a wasteful number, since it uses less digits than its factorization.

55239492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529 (or 527 counting only the distinct ones).

The product of its digits is 97200, while the sum is 39.

The square root of 55239492 is about 7432.3274954754. The cubic root of 55239492 is about 380.8464326928.

The spelling of 55239492 in words is "fifty-five million, two hundred thirty-nine thousand, four hundred ninety-two".