55051512 has 128 divisors (see below), whose sum is σ = 157248000. Its totient is φ = 15966720.

The previous prime is 55051487. The next prime is 55051519. The reversal of 55051512 is 21515055.

It is a super-2 number, since 2×55051512² = 6061337946972288, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55051519) 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, 304062 + ... + 304242.

It is an arithmetic number, because the mean of its divisors is an integer number (1228500).

Almost surely, 2^55051512 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 55051512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78624000).

55051512 is an abundant number, since it is smaller than the sum of its proper divisors (102196488).

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

55051512 is a wasteful number, since it uses less digits than its factorization.

55051512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 24.

The square root of 55051512 is about 7419.6706126350. The cubic root of 55051512 is about 380.4139349009.

Adding to 55051512 its reverse (21515055), we get a palindrome (76566567).

The spelling of 55051512 in words is "fifty-five million, fifty-one thousand, five hundred twelve".