51765951 has 12 divisors (see below), whose sum is σ = 70225112. Its totient is φ = 33918864.

The previous prime is 51765949. The next prime is 51765977. The reversal of 51765951 is 15956715.

It is not a de Polignac number, because 51765951 - 2¹ = 51765949 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 (51765911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7965 + ... + 12921.

Almost surely, 2^51765951 is an apocalyptic number.

51765951 is a deficient number, since it is larger than the sum of its proper divisors (18459161).

51765951 is an equidigital number, since it uses as much as digits as its factorization.

51765951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5078 (or 5019 counting only the distinct ones).

The product of its digits is 47250, while the sum is 39.

The square root of 51765951 is about 7194.8558706898. The cubic root of 51765951 is about 372.6902794951.

The spelling of 51765951 in words is "fifty-one million, seven hundred sixty-five thousand, nine hundred fifty-one".