55412520 has 128 divisors (see below), whose sum is σ = 183824640. Its totient is φ = 13291520.

The previous prime is 55412519. The next prime is 55412521. The reversal of 55412520 is 2521455.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (55412519) and next prime (55412521).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (55412521) 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, 46330 + ... + 47510.

It is an arithmetic number, because the mean of its divisors is an integer number (1436130).

Almost surely, 2^55412520 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 55412520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91912320).

55412520 is an abundant number, since it is smaller than the sum of its proper divisors (128412120).

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

55412520 is a wasteful number, since it uses less digits than its factorization.

55412520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235 (or 1231 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 55412520 is about 7443.9586242805. The cubic root of 55412520 is about 381.2436630677.

Adding to 55412520 its reverse (2521455), we get a palindrome (57933975).

The spelling of 55412520 in words is "fifty-five million, four hundred twelve thousand, five hundred twenty".