51912161 has 12 divisors (see below), whose sum is σ = 62618112. Its totient is φ = 42152184.

The previous prime is 51912151. The next prime is 51912181. The reversal of 51912161 is 16121915.

It is not a de Polignac number, because 51912161 - 2⁶ = 51912097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51912161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51912151) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7745 + ... + 12798.

It is an arithmetic number, because the mean of its divisors is an integer number (5218176).

Almost surely, 2^51912161 is an apocalyptic number.

It is an amenable number.

51912161 is a deficient number, since it is larger than the sum of its proper divisors (10705951).

51912161 is a wasteful number, since it uses less digits than its factorization.

51912161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20588 (or 20569 counting only the distinct ones).

The product of its digits is 540, while the sum is 26.

The square root of 51912161 is about 7205.0094378842. The cubic root of 51912161 is about 373.0408305348.

The spelling of 51912161 in words is "fifty-one million, nine hundred twelve thousand, one hundred sixty-one".