51493357 has 16 divisors (see below), whose sum is σ = 56862000. Its totient is φ = 46412800.

The previous prime is 51493313. The next prime is 51493367. The reversal of 51493357 is 75339415.

It can be written as a sum of positive squares in 8 ways, for example, as 1069156 + 50424201 = 1034^2 + 7101^2 .

It is a cyclic number.

It is not a de Polignac number, because 51493357 - 2⁷ = 51493229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51493367) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73107 + ... + 73807.

It is an arithmetic number, because the mean of its divisors is an integer number (3553875).

Almost surely, 2^51493357 is an apocalyptic number.

It is an amenable number.

51493357 is a deficient number, since it is larger than the sum of its proper divisors (5368643).

51493357 is a wasteful number, since it uses less digits than its factorization.

51493357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896.

The product of its digits is 56700, while the sum is 37.

The square root of 51493357 is about 7175.8871925358. The cubic root of 51493357 is about 372.0349453625.

The spelling of 51493357 in words is "fifty-one million, four hundred ninety-three thousand, three hundred fifty-seven".