51917492 has 24 divisors (see below), whose sum is σ = 99550080. Its totient is φ = 23495360.

The previous prime is 51917479. The next prime is 51917501. The reversal of 51917492 is 29471915.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8048 + ... + 12984.

It is an arithmetic number, because the mean of its divisors is an integer number (4147920).

Almost surely, 2^51917492 is an apocalyptic number.

It is an amenable number.

51917492 is a deficient number, since it is larger than the sum of its proper divisors (47632588).

51917492 is a wasteful number, since it uses less digits than its factorization.

51917492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5191 (or 5189 counting only the distinct ones).

The product of its digits is 22680, while the sum is 38.

The square root of 51917492 is about 7205.3793793249. The cubic root of 51917492 is about 373.0535996211.

The spelling of 51917492 in words is "fifty-one million, nine hundred seventeen thousand, four hundred ninety-two".