51998633 has 4 divisors (see below), whose sum is σ = 52774800. Its totient is φ = 51222468.

The previous prime is 51998627. The next prime is 51998641. The reversal of 51998633 is 33689915.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51998633 - 2¹⁶ = 51933097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51998603) 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, 387983 + ... + 388116.

It is an arithmetic number, because the mean of its divisors is an integer number (13193700).

Almost surely, 2^51998633 is an apocalyptic number.

It is an amenable number.

51998633 is a deficient number, since it is larger than the sum of its proper divisors (776167).

51998633 is an equidigital number, since it uses as much as digits as its factorization.

51998633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776166.

The product of its digits is 174960, while the sum is 44.

The square root of 51998633 is about 7211.0077659090. The cubic root of 51998633 is about 373.2478449205.

The spelling of 51998633 in words is "fifty-one million, nine hundred ninety-eight thousand, six hundred thirty-three".