51297513 has 8 divisors (see below), whose sum is σ = 68691168. Its totient is φ = 34051104.

The previous prime is 51297509. The next prime is 51297527. The reversal of 51297513 is 31579215.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51297513 - 2² = 51297509 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51297563) 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, 35995 + ... + 37392.

It is an arithmetic number, because the mean of its divisors is an integer number (8586396).

Almost surely, 2^51297513 is an apocalyptic number.

It is an amenable number.

51297513 is a deficient number, since it is larger than the sum of its proper divisors (17393655).

51297513 is a wasteful number, since it uses less digits than its factorization.

51297513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73623.

The product of its digits is 9450, while the sum is 33.

The square root of 51297513 is about 7162.2282147388. The cubic root of 51297513 is about 371.5626942998.

The spelling of 51297513 in words is "fifty-one million, two hundred ninety-seven thousand, five hundred thirteen".