51013257 has 8 divisors (see below), whose sum is σ = 68323584. Its totient is φ = 33855888.

The previous prime is 51013231. The next prime is 51013289. The reversal of 51013257 is 75231015.

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

It is not a de Polignac number, because 51013257 - 2⁷ = 51013129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51013357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37458 + ... + 38795.

It is an arithmetic number, because the mean of its divisors is an integer number (8540448).

Almost surely, 2^51013257 is an apocalyptic number.

It is an amenable number.

51013257 is a deficient number, since it is larger than the sum of its proper divisors (17310327).

51013257 is a wasteful number, since it uses less digits than its factorization.

51013257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76479.

The product of its (nonzero) digits is 1050, while the sum is 24.

The square root of 51013257 is about 7142.3565438866. The cubic root of 51013257 is about 370.8751065961.

The spelling of 51013257 in words is "fifty-one million, thirteen thousand, two hundred fifty-seven".