51512146 has 16 divisors (see below), whose sum is σ = 89626176. Its totient is φ = 21746736.

The previous prime is 51512129. The next prime is 51512147. The reversal of 51512146 is 64121515.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 51512146.

It is not an unprimeable number, because it can be changed into a prime (51512147) 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, 26521 + ... + 28396.

It is an arithmetic number, because the mean of its divisors is an integer number (5601636).

Almost surely, 2^51512146 is an apocalyptic number.

51512146 is a deficient number, since it is larger than the sum of its proper divisors (38114030).

51512146 is a wasteful number, since it uses less digits than its factorization.

51512146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54993.

The product of its digits is 1200, while the sum is 25.

The square root of 51512146 is about 7177.1962492327. The cubic root of 51512146 is about 372.0801894805.

It can be divided in two parts, 5 and 1512146, that added together give a palindrome (1512151).

The spelling of 51512146 in words is "fifty-one million, five hundred twelve thousand, one hundred forty-six".