51799816 has 16 divisors (see below), whose sum is σ = 102838140. Its totient is φ = 24376320.

The previous prime is 51799807. The next prime is 51799823. The reversal of 51799816 is 61899715.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 44756100 + 7043716 = 6690^2 + 2654^2 .

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 3 ways as a sum of consecutive naturals, for example, 190305 + ... + 190576.

Almost surely, 2^51799816 is an apocalyptic number.

It is an amenable number.

51799816 is a deficient number, since it is larger than the sum of its proper divisors (51038324).

51799816 is a wasteful number, since it uses less digits than its factorization.

51799816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380904 (or 380900 counting only the distinct ones).

The product of its digits is 136080, while the sum is 46.

The square root of 51799816 is about 7197.2089034570. The cubic root of 51799816 is about 372.7715324219.

The spelling of 51799816 in words is "fifty-one million, seven hundred ninety-nine thousand, eight hundred sixteen".