55439250 has 64 divisors (see below), whose sum is σ = 139456512. Its totient is φ = 14668800.

The previous prime is 55439249. The next prime is 55439299. The reversal of 55439250 is 5293455.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 144559 + ... + 144941.

It is an arithmetic number, because the mean of its divisors is an integer number (2179008).

Almost surely, 2^55439250 is an apocalyptic number.

55439250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 55439250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69728256).

55439250 is an abundant number, since it is smaller than the sum of its proper divisors (84017262).

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

55439250 is a wasteful number, since it uses less digits than its factorization.

55439250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596 (or 586 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 55439250 is about 7445.7538234889. The cubic root of 55439250 is about 381.3049549018.

The spelling of 55439250 in words is "fifty-five million, four hundred thirty-nine thousand, two hundred fifty".