51518885 has 16 divisors (see below), whose sum is σ = 67832640. Its totient is φ = 37251840.

The previous prime is 51518879. The next prime is 51518893. The reversal of 51518885 is 58881515.

It is not a de Polignac number, because 51518885 - 2¹² = 51514789 is a prime.

It is a congruent number.

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, 7229 + ... + 12461.

It is an arithmetic number, because the mean of its divisors is an integer number (4239540).

Almost surely, 2^51518885 is an apocalyptic number.

51518885 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51518885 is a deficient number, since it is larger than the sum of its proper divisors (16313755).

51518885 is a wasteful number, since it uses less digits than its factorization.

51518885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5428.

The product of its digits is 64000, while the sum is 41.

The square root of 51518885 is about 7177.6657068994. The cubic root of 51518885 is about 372.0964143857.

The spelling of 51518885 in words is "fifty-one million, five hundred eighteen thousand, eight hundred eighty-five".