51610216 has 16 divisors (see below), whose sum is σ = 110593440. Its totient is φ = 22118640.

The previous prime is 51610211. The next prime is 51610217. The reversal of 51610216 is 61201615.

It is a super-2 number, since 2×51610216² = 5327228791133312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51610211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 460750 + ... + 460861.

It is an arithmetic number, because the mean of its divisors is an integer number (6912090).

Almost surely, 2^51610216 is an apocalyptic number.

51610216 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

51610216 is an abundant number, since it is smaller than the sum of its proper divisors (58983224).

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

51610216 is a wasteful number, since it uses less digits than its factorization.

51610216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921624 (or 921620 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 51610216 is about 7184.0250556356. The cubic root of 51610216 is about 372.3161647129.

Subtracting from 51610216 its product of nonzero digits (360), we obtain a square (51609856 = 7184²).

The spelling of 51610216 in words is "fifty-one million, six hundred ten thousand, two hundred sixteen".