51949975 has 24 divisors (see below), whose sum is σ = 80316288. Its totient is φ = 32383200.

The previous prime is 51949969. The next prime is 51950023. The reversal of 51949975 is 57994915.

51949975 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 51949975 - 2³ = 51949967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 11569 + ... + 15418.

It is an arithmetic number, because the mean of its divisors is an integer number (3346512).

Almost surely, 2^51949975 is an apocalyptic number.

51949975 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51949975 is a deficient number, since it is larger than the sum of its proper divisors (28366313).

51949975 is a wasteful number, since it uses less digits than its factorization.

51949975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27015 (or 27010 counting only the distinct ones).

The product of its digits is 510300, while the sum is 49.

The square root of 51949975 is about 7207.6331066446. The cubic root of 51949975 is about 373.1313856956.

The spelling of 51949975 in words is "fifty-one million, nine hundred forty-nine thousand, nine hundred seventy-five".