51811474 has 48 divisors (see below), whose sum is σ = 94381056. Its totient is φ = 21178080.

The previous prime is 51811453. The next prime is 51811489. The reversal of 51811474 is 47411815.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

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 23 ways as a sum of consecutive naturals, for example, 135087 + ... + 135469.

It is an arithmetic number, because the mean of its divisors is an integer number (1966272).

Almost surely, 2^51811474 is an apocalyptic number.

51811474 is a deficient number, since it is larger than the sum of its proper divisors (42569582).

51811474 is a wasteful number, since it uses less digits than its factorization.

51811474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463 (or 452 counting only the distinct ones).

The product of its digits is 4480, while the sum is 31.

The square root of 51811474 is about 7198.0187551853. The cubic root of 51811474 is about 372.7994954849.

The spelling of 51811474 in words is "fifty-one million, eight hundred eleven thousand, four hundred seventy-four".