51494817 has 24 divisors (see below), whose sum is σ = 76131328. Its totient is φ = 30935520.

The previous prime is 51494803. The next prime is 51494827. The reversal of 51494817 is 71849415.

It is not a de Polignac number, because 51494817 - 2⁶ = 51494753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51494827) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45543 + ... + 46659.

Almost surely, 2^51494817 is an apocalyptic number.

It is an amenable number.

51494817 is a deficient number, since it is larger than the sum of its proper divisors (24636511).

51494817 is a wasteful number, since it uses less digits than its factorization.

51494817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1269 (or 1258 counting only the distinct ones).

The product of its digits is 40320, while the sum is 39.

The square root of 51494817 is about 7175.9889213961. The cubic root of 51494817 is about 372.0384614528.

The spelling of 51494817 in words is "fifty-one million, four hundred ninety-four thousand, eight hundred seventeen".