51670751 has 8 divisors (see below), whose sum is σ = 56835408. Its totient is φ = 46972200.

The previous prime is 51670699. The next prime is 51670753. The reversal of 51670751 is 15707615.

It is a de Polignac number, because none of the positive numbers 2^k-51670751 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 (51670753) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18080 + ... + 20741.

It is an arithmetic number, because the mean of its divisors is an integer number (7104426).

Almost surely, 2^51670751 is an apocalyptic number.

51670751 is a deficient number, since it is larger than the sum of its proper divisors (5164657).

51670751 is an equidigital number, since it uses as much as digits as its factorization.

51670751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38854 (or 38832 counting only the distinct ones).

The product of its (nonzero) digits is 7350, while the sum is 32.

The square root of 51670751 is about 7188.2369883025. The cubic root of 51670751 is about 372.4616743597.

The spelling of 51670751 in words is "fifty-one million, six hundred seventy thousand, seven hundred fifty-one".