51767973 has 6 divisors (see below), whose sum is σ = 74775974. Its totient is φ = 34511976.

The previous prime is 51767971. The next prime is 51767977. The reversal of 51767973 is 37976715.

51767973 is a `hidden beast` number, since 517 + 67 + 9 + 73 = 666.

It can be written as a sum of positive squares in only one way, i.e., 49871844 + 1896129 = 7062^2 + 1377^2 .

It is not a de Polignac number, because 51767973 - 2¹ = 51767971 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 (51767971) 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, 2875990 + ... + 2876007.

Almost surely, 2^51767973 is an apocalyptic number.

It is an amenable number.

51767973 is a deficient number, since it is larger than the sum of its proper divisors (23008001).

51767973 is a wasteful number, since it uses less digits than its factorization.

51767973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5752003 (or 5752000 counting only the distinct ones).

The product of its digits is 277830, while the sum is 45.

The square root of 51767973 is about 7194.9963863785. The cubic root of 51767973 is about 372.6951319121.

The spelling of 51767973 in words is "fifty-one million, seven hundred sixty-seven thousand, nine hundred seventy-three".