51245542223 has 4 divisors (see below), whose sum is σ = 51773846880. Its totient is φ = 50717237568.

The previous prime is 51245542199. The next prime is 51245542303. The reversal of 51245542223 is 32224554215.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 51245542223 - 2⁸ = 51245541967 is a prime.

It is a super-2 number, since 2×51245542223² (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 (51245542423) 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, 264152183 + ... + 264152376.

It is an arithmetic number, because the mean of its divisors is an integer number (12943461720).

Almost surely, 2^51245542223 is an apocalyptic number.

51245542223 is a deficient number, since it is larger than the sum of its proper divisors (528304657).

51245542223 is an equidigital number, since it uses as much as digits as its factorization.

51245542223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528304656.

The product of its digits is 96000, while the sum is 35.

The spelling of 51245542223 in words is "fifty-one billion, two hundred forty-five million, five hundred forty-two thousand, two hundred twenty-three".