55509504 has 80 divisors (see below), whose sum is σ = 150258240. Its totient is φ = 18206720.

The previous prime is 55509479. The next prime is 55509529. The reversal of 55509504 is 40590555.

It is an interprime number because it is at equal distance from previous prime (55509479) and next prime (55509529).

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, 108802 + ... + 109310.

It is an arithmetic number, because the mean of its divisors is an integer number (1878228).

Almost surely, 2^55509504 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 55509504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75129120).

55509504 is an abundant number, since it is smaller than the sum of its proper divisors (94748736).

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

55509504 is an equidigital number, since it uses as much as digits as its factorization.

55509504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601 (or 585 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 55509504 is about 7450.4700522853. The cubic root of 55509504 is about 381.4659532962.

The spelling of 55509504 in words is "fifty-five million, five hundred nine thousand, five hundred four".