51820974 has 24 divisors (see below), whose sum is σ = 112874112. Its totient is φ = 17182080.

The previous prime is 51820973. The next prime is 51820987. The reversal of 51820974 is 47902815.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51820973) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4099 + ... + 10974.

It is an arithmetic number, because the mean of its divisors is an integer number (4703088).

Almost surely, 2^51820974 is an apocalyptic number.

51820974 is an abundant number, since it is smaller than the sum of its proper divisors (61053138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51820974 is a wasteful number, since it uses less digits than its factorization.

51820974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15272 (or 15269 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 51820974 is about 7198.6786287485. The cubic root of 51820974 is about 372.8222792333.

The spelling of 51820974 in words is "fifty-one million, eight hundred twenty thousand, nine hundred seventy-four".