51512970 has 16 divisors (see below), whose sum is σ = 123631200. Its totient is φ = 13736784.

The previous prime is 51512969. The next prime is 51513001. The reversal of 51512970 is 7921515.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 1717099 = 51512970 / (5 + 1 + 5 + 1 + 2 + 9 + 7 + 0).

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, 858520 + ... + 858579.

It is an arithmetic number, because the mean of its divisors is an integer number (7726950).

Almost surely, 2^51512970 is an apocalyptic number.

51512970 is an abundant number, since it is smaller than the sum of its proper divisors (72118230).

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

51512970 is a wasteful number, since it uses less digits than its factorization.

51512970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1717109.

The product of its (nonzero) digits is 3150, while the sum is 30.

The square root of 51512970 is about 7177.2536530347. The cubic root of 51512970 is about 372.0821734297.

The spelling of 51512970 in words is "fifty-one million, five hundred twelve thousand, nine hundred seventy".