51521885 has 8 divisors (see below), whose sum is σ = 62000640. Its totient is φ = 41101264.

The previous prime is 51521857. The next prime is 51521903. The reversal of 51521885 is 58812515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51521885 - 2¹² = 51517789 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12557 + ... + 16146.

It is an arithmetic number, because the mean of its divisors is an integer number (7750080).

Almost surely, 2^51521885 is an apocalyptic number.

It is an amenable number.

51521885 is a deficient number, since it is larger than the sum of its proper divisors (10478755).

51521885 is a wasteful number, since it uses less digits than its factorization.

51521885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29067.

The product of its digits is 16000, while the sum is 35.

The square root of 51521885 is about 7177.8746854483. The cubic root of 51521885 is about 372.1036367701.

The spelling of 51521885 in words is "fifty-one million, five hundred twenty-one thousand, eight hundred eighty-five".