51233251999 has 8 divisors (see below), whose sum is σ = 51538052720. Its totient is φ = 50929347456.

The previous prime is 51233251961. The next prime is 51233252003. The reversal of 51233251999 is 99915233215.

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

It is a cyclic number.

It is not a de Polignac number, because 51233251999 - 2²⁷ = 51099034271 is a prime.

It is a super-2 number, since 2×51233251999² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51233251799) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109194 + ... + 338215.

It is an arithmetic number, because the mean of its divisors is an integer number (6442256590).

Almost surely, 2^51233251999 is an apocalyptic number.

51233251999 is a deficient number, since it is larger than the sum of its proper divisors (304800721).

51233251999 is a wasteful number, since it uses less digits than its factorization.

51233251999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448089.

The product of its digits is 656100, while the sum is 49.

The spelling of 51233251999 in words is "fifty-one billion, two hundred thirty-three million, two hundred fifty-one thousand, nine hundred ninety-nine".