51513402 has 32 divisors (see below), whose sum is σ = 105868224. Its totient is φ = 16704000.

The previous prime is 51513391. The next prime is 51513433. The reversal of 51513402 is 20431515.

It is a super-2 number, since 2×51513402² = 5307261171227208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34777 + ... + 36227.

It is an arithmetic number, because the mean of its divisors is an integer number (3308382).

Almost surely, 2^51513402 is an apocalyptic number.

51513402 is an abundant number, since it is smaller than the sum of its proper divisors (54354822).

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

51513402 is a wasteful number, since it uses less digits than its factorization.

51513402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1614.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 51513402 is about 7177.2837480484. The cubic root of 51513402 is about 372.0832135499.

Adding to 51513402 its reverse (20431515), we get a palindrome (71944917).

It can be divided in two parts, 51513 and 402, that added together give a palindrome (51915).

The spelling of 51513402 in words is "fifty-one million, five hundred thirteen thousand, four hundred two".