51367257 has 32 divisors (see below), whose sum is σ = 80021760. Its totient is φ = 32503680.

The previous prime is 51367247. The next prime is 51367259. The reversal of 51367257 is 75276315.

It is not a de Polignac number, because 51367257 - 2¹² = 51363161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51367259) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 112173 + ... + 112629.

It is an arithmetic number, because the mean of its divisors is an integer number (2500680).

Almost surely, 2^51367257 is an apocalyptic number.

It is an amenable number.

51367257 is a deficient number, since it is larger than the sum of its proper divisors (28654503).

51367257 is a wasteful number, since it uses less digits than its factorization.

51367257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670 (or 664 counting only the distinct ones).

The product of its digits is 44100, while the sum is 36.

The square root of 51367257 is about 7167.0954367861. The cubic root of 51367257 is about 371.7310100171.

The spelling of 51367257 in words is "fifty-one million, three hundred sixty-seven thousand, two hundred fifty-seven".