51497794 has 24 divisors (see below), whose sum is σ = 84755268. Its totient is φ = 23385600.

The previous prime is 51497783. The next prime is 51497801. The reversal of 51497794 is 49779415.

It can be written as a sum of positive squares in 6 ways, for example, as 23882769 + 27615025 = 4887^2 + 5255^2 .

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 11 ways as a sum of consecutive naturals, for example, 27694 + ... + 29494.

Almost surely, 2^51497794 is an apocalyptic number.

51497794 is a deficient number, since it is larger than the sum of its proper divisors (33257474).

51497794 is a wasteful number, since it uses less digits than its factorization.

51497794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1878 (or 1849 counting only the distinct ones).

The product of its digits is 317520, while the sum is 46.

The square root of 51497794 is about 7176.1963462547. The cubic root of 51497794 is about 372.0456306996.

The spelling of 51497794 in words is "fifty-one million, four hundred ninety-seven thousand, seven hundred ninety-four".