51126023999 has 4 divisors (see below), whose sum is σ = 51129054936. Its totient is φ = 51122993064.

The previous prime is 51126023987. The next prime is 51126024023. The reversal of 51126023999 is 99932062115.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51126023999 is a prime.

It is a super-2 number, since 2×51126023999² (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 (51126023959) 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, 1490024 + ... + 1523949.

It is an arithmetic number, because the mean of its divisors is an integer number (12782263734).

Almost surely, 2^51126023999 is an apocalyptic number.

51126023999 is a deficient number, since it is larger than the sum of its proper divisors (3030937).

51126023999 is a wasteful number, since it uses less digits than its factorization.

51126023999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3030936.

The product of its (nonzero) digits is 262440, while the sum is 47.

The spelling of 51126023999 in words is "fifty-one billion, one hundred twenty-six million, twenty-three thousand, nine hundred ninety-nine".