51023535223 has 4 divisors (see below), whose sum is σ = 51038514720. Its totient is φ = 51008555728.

The previous prime is 51023535209. The next prime is 51023535253. The reversal of 51023535223 is 32253532015.

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-51023535223 is a prime.

It is a super-2 number, since 2×51023535223² (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 (51023535253) 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, 7484638 + ... + 7491451.

It is an arithmetic number, because the mean of its divisors is an integer number (12759628680).

Almost surely, 2^51023535223 is an apocalyptic number.

51023535223 is a deficient number, since it is larger than the sum of its proper divisors (14979497).

51023535223 is a wasteful number, since it uses less digits than its factorization.

51023535223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14979496.

The product of its (nonzero) digits is 27000, while the sum is 31.

The spelling of 51023535223 in words is "fifty-one billion, twenty-three million, five hundred thirty-five thousand, two hundred twenty-three".