51241808 has 20 divisors (see below), whose sum is σ = 105121620. Its totient is φ = 24113664.

The previous prime is 51241807. The next prime is 51241819. The reversal of 51241808 is 80814215.

It can be written as a sum of positive squares in 2 ways, for example, as 46348864 + 4892944 = 6808^2 + 2212^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51241807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93923 + ... + 94466.

It is an arithmetic number, because the mean of its divisors is an integer number (5256081).

Almost surely, 2^51241808 is an apocalyptic number.

It is an amenable number.

51241808 is an abundant number, since it is smaller than the sum of its proper divisors (53879812).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51241808 is a wasteful number, since it uses less digits than its factorization.

51241808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188414 (or 188408 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 51241808 is about 7158.3383546742. The cubic root of 51241808 is about 371.4281497882.

The spelling of 51241808 in words is "fifty-one million, two hundred forty-one thousand, eight hundred eight".