51812998 has 8 divisors (see below), whose sum is σ = 77784192. Its totient is φ = 25884936.

The previous prime is 51812993. The next prime is 51813001. The reversal of 51812998 is 89921815.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51812993) 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, 7590 + ... + 12697.

It is an arithmetic number, because the mean of its divisors is an integer number (9723024).

Almost surely, 2^51812998 is an apocalyptic number.

51812998 is a deficient number, since it is larger than the sum of its proper divisors (25971194).

51812998 is a wasteful number, since it uses less digits than its factorization.

51812998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21566.

The product of its digits is 51840, while the sum is 43.

The square root of 51812998 is about 7198.1246168707. The cubic root of 51812998 is about 372.8031506653.

The spelling of 51812998 in words is "fifty-one million, eight hundred twelve thousand, nine hundred ninety-eight".