51474775 has 12 divisors (see below), whose sum is σ = 69631704. Its totient is φ = 37436000.

The previous prime is 51474769. The next prime is 51474779. The reversal of 51474775 is 57747415.

It is a happy number.

51474775 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51474775 - 2³ = 51474767 is a prime.

It is a super-2 number, since 2×51474775² = 5299304922601250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51474779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93316 + ... + 93865.

It is an arithmetic number, because the mean of its divisors is an integer number (5802642).

Almost surely, 2^51474775 is an apocalyptic number.

51474775 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51474775 is a deficient number, since it is larger than the sum of its proper divisors (18156929).

51474775 is a wasteful number, since it uses less digits than its factorization.

51474775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187202 (or 187197 counting only the distinct ones).

The product of its digits is 137200, while the sum is 40.

The square root of 51474775 is about 7174.5923229128. The cubic root of 51474775 is about 371.9901888768.

The spelling of 51474775 in words is "fifty-one million, four hundred seventy-four thousand, seven hundred seventy-five".