51425898 has 8 divisors (see below), whose sum is σ = 102851808. Its totient is φ = 17141964.

The previous prime is 51425851. The next prime is 51425909. The reversal of 51425898 is 89852415.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

51425898 is an admirable number.

It is a Curzon number.

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, 4285486 + ... + 4285497.

It is an arithmetic number, because the mean of its divisors is an integer number (12856476).

Almost surely, 2^51425898 is an apocalyptic number.

51425898 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51425898 is a wasteful number, since it uses less digits than its factorization.

51425898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8570988.

The product of its digits is 115200, while the sum is 42.

The square root of 51425898 is about 7171.1852576823. The cubic root of 51425898 is about 371.8724125988.

The spelling of 51425898 in words is "fifty-one million, four hundred twenty-five thousand, eight hundred ninety-eight".