51481804 has 24 divisors (see below), whose sum is σ = 99899856. Its totient is φ = 23016000.

The previous prime is 51481753. The next prime is 51481823. The reversal of 51481804 is 40818415.

It is a super-2 number, since 2×51481804² = 5300752286188832, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct 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 7 ways as a sum of consecutive naturals, for example, 6907 + ... + 12274.

It is an arithmetic number, because the mean of its divisors is an integer number (4162494).

Almost surely, 2^51481804 is an apocalyptic number.

It is an amenable number.

51481804 is a deficient number, since it is larger than the sum of its proper divisors (48418052).

51481804 is a wasteful number, since it uses less digits than its factorization.

51481804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19257 (or 19255 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 31.

The square root of 51481804 is about 7175.0821598083. The cubic root of 51481804 is about 372.0071201474.

The spelling of 51481804 in words is "fifty-one million, four hundred eighty-one thousand, eight hundred four".