51797767 has 16 divisors (see below), whose sum is σ = 60514560. Its totient is φ = 43420608.

The previous prime is 51797747. The next prime is 51797789. The reversal of 51797767 is 76779715.

It is not a de Polignac number, because 51797767 - 2⁷ = 51797639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51797767.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51797747) 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, 83643 + ... + 84259.

It is an arithmetic number, because the mean of its divisors is an integer number (3782160).

Almost surely, 2^51797767 is an apocalyptic number.

51797767 is a deficient number, since it is larger than the sum of its proper divisors (8716793).

51797767 is a wasteful number, since it uses less digits than its factorization.

51797767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870.

The product of its digits is 648270, while the sum is 49.

The square root of 51797767 is about 7197.0665552015. The cubic root of 51797767 is about 372.7666172247.

The spelling of 51797767 in words is "fifty-one million, seven hundred ninety-seven thousand, seven hundred sixty-seven".