55132520 has 64 divisors (see below), whose sum is σ = 127872000. Its totient is φ = 21385728.

The previous prime is 55132507. The next prime is 55132531. The reversal of 55132520 is 2523155.

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, 230561 + ... + 230799.

It is an arithmetic number, because the mean of its divisors is an integer number (1998000).

Almost surely, 2^55132520 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 55132520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63936000).

55132520 is an abundant number, since it is smaller than the sum of its proper divisors (72739480).

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

55132520 is a wasteful number, since it uses less digits than its factorization.

55132520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 55132520 is about 7425.1276083311. The cubic root of 55132520 is about 380.6004357967.

Adding to 55132520 its reverse (2523155), we get a palindrome (57655675).

The spelling of 55132520 in words is "fifty-five million, one hundred thirty-two thousand, five hundred twenty".