55045812 has 24 divisors (see below), whose sum is σ = 135200800. Its totient is φ = 17382816.

The previous prime is 55045787. The next prime is 55045817. The reversal of 55045812 is 21854055.

It is a self number, because there is not a number n which added to its sum of digits gives 55045812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55045817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120487 + ... + 120942.

Almost surely, 2^55045812 is an apocalyptic number.

It is an amenable number.

55045812 is an abundant number, since it is smaller than the sum of its proper divisors (80154988).

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

55045812 is a wasteful number, since it uses less digits than its factorization.

55045812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241455 (or 241453 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

The square root of 55045812 is about 7419.2864886052. The cubic root of 55045812 is about 380.4008051721.

Adding to 55045812 its reverse (21854055), we get a palindrome (76899867).

The spelling of 55045812 in words is "fifty-five million, forty-five thousand, eight hundred twelve".