51819474 has 32 divisors (see below), whose sum is σ = 120969216. Its totient is φ = 14490000.

The previous prime is 51819461. The next prime is 51819487. The reversal of 51819474 is 47491815.

It is an interprime number because it is at equal distance from previous prime (51819461) and next prime (51819487).

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11152 + ... + 15099.

It is an arithmetic number, because the mean of its divisors is an integer number (3780288).

Almost surely, 2^51819474 is an apocalyptic number.

51819474 is an abundant number, since it is smaller than the sum of its proper divisors (69149742).

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

51819474 is a wasteful number, since it uses less digits than its factorization.

51819474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26310.

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

The square root of 51819474 is about 7198.5744422073. The cubic root of 51819474 is about 372.8186819845.

The spelling of 51819474 in words is "fifty-one million, eight hundred nineteen thousand, four hundred seventy-four".