51144885 has 96 divisors (see below), whose sum is σ = 104186880. Its totient is φ = 23760000.

The previous prime is 51144881. The next prime is 51144887. The reversal of 51144885 is 58844115.

It is not a de Polignac number, because 51144885 - 2² = 51144881 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51144881) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 506335 + ... + 506435.

It is an arithmetic number, because the mean of its divisors is an integer number (1085280).

Almost surely, 2^51144885 is an apocalyptic number.

51144885 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51144885 is an abundant number, since it is smaller than the sum of its proper divisors (53041995).

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

51144885 is a wasteful number, since it uses less digits than its factorization.

51144885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 151 counting only the distinct ones).

The product of its digits is 25600, while the sum is 36.

The square root of 51144885 is about 7151.5652132942. The cubic root of 51144885 is about 371.1938186590.

It can be divided in two parts, 5114 and 4885, that added together give a palindrome (9999).

The spelling of 51144885 in words is "fifty-one million, one hundred forty-four thousand, eight hundred eighty-five".