51216036 has 24 divisors (see below), whose sum is σ = 126534240. Its totient is φ = 16067712.

The previous prime is 51216031. The next prime is 51216037. The reversal of 51216036 is 63061215.

51216036 = T₆₃ + T₆₄ + ... + T₆₇₄.

It is a junction number, because it is equal to n+sod(n) for n = 51215997 and 51216015.

It is not an unprimeable number, because it can be changed into a prime (51216031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125326 + ... + 125733.

It is an arithmetic number, because the mean of its divisors is an integer number (5272260).

Almost surely, 2^51216036 is an apocalyptic number.

It is an amenable number.

51216036 is an abundant number, since it is smaller than the sum of its proper divisors (75318204).

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

51216036 is a wasteful number, since it uses less digits than its factorization.

51216036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251083 (or 251081 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 51216036 is about 7156.5379898384. The cubic root of 51216036 is about 371.3658695792.

The spelling of 51216036 in words is "fifty-one million, two hundred sixteen thousand, thirty-six".