55279500 has 96 divisors (see below), whose sum is σ = 162751680. Its totient is φ = 14579200.

The previous prime is 55279463. The next prime is 55279501. The reversal of 55279500 is 597255.

It is not an unprimeable number, because it can be changed into a prime (55279501) 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, 205366 + ... + 205634.

It is an arithmetic number, because the mean of its divisors is an integer number (1695330).

Almost surely, 2^55279500 is an apocalyptic number.

55279500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55279500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81375840).

55279500 is an abundant number, since it is smaller than the sum of its proper divisors (107472180).

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

55279500 is a wasteful number, since it uses less digits than its factorization.

55279500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428 (or 416 counting only the distinct ones).

The product of its (nonzero) digits is 15750, while the sum is 33.

The square root of 55279500 is about 7435.0184935883. The cubic root of 55279500 is about 380.9383550144.

The spelling of 55279500 in words is "fifty-five million, two hundred seventy-nine thousand, five hundred".