51672501 has 6 divisors (see below), whose sum is σ = 74638070. Its totient is φ = 34448328.

The previous prime is 51672487. The next prime is 51672529. The reversal of 51672501 is 10527615.

It can be written as a sum of positive squares in only one way, i.e., 49914225 + 1758276 = 7065^2 + 1326^2 .

It is not a de Polignac number, because 51672501 - 2⁶ = 51672437 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 (51672581) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2870686 + ... + 2870703.

Almost surely, 2^51672501 is an apocalyptic number.

It is an amenable number.

51672501 is a deficient number, since it is larger than the sum of its proper divisors (22965569).

51672501 is a wasteful number, since it uses less digits than its factorization.

51672501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5741395 (or 5741392 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 51672501 is about 7188.3587139207. The cubic root of 51672501 is about 372.4658791923.

The spelling of 51672501 in words is "fifty-one million, six hundred seventy-two thousand, five hundred one".