55349520 has 80 divisors (see below), whose sum is σ = 172554432. Its totient is φ = 14676480.

The previous prime is 55349519. The next prime is 55349531. The reversal of 55349520 is 2594355.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50094 + ... + 51186.

Almost surely, 2^55349520 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 55349520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86277216).

55349520 is an abundant number, since it is smaller than the sum of its proper divisors (117204912).

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

55349520 is a wasteful number, since it uses less digits than its factorization.

55349520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320 (or 1314 counting only the distinct ones).

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

The square root of 55349520 is about 7439.7258013989. The cubic root of 55349520 is about 381.0991261838.

The spelling of 55349520 in words is "fifty-five million, three hundred forty-nine thousand, five hundred twenty".