51455226623 has 4 divisors (see below), whose sum is σ = 51487733088. Its totient is φ = 51422720160.

The previous prime is 51455226601. The next prime is 51455226701. The reversal of 51455226623 is 32662255415.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32662255415 = 5 ⋅6532451083.

It is a cyclic number.

It is not a de Polignac number, because 51455226623 - 2⁸ = 51455226367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51455226223) 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, 16250858 + ... + 16254023.

It is an arithmetic number, because the mean of its divisors is an integer number (12871933272).

Almost surely, 2^51455226623 is an apocalyptic number.

51455226623 is a deficient number, since it is larger than the sum of its proper divisors (32506465).

51455226623 is a wasteful number, since it uses less digits than its factorization.

51455226623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32506464.

The product of its digits is 432000, while the sum is 41.

The spelling of 51455226623 in words is "fifty-one billion, four hundred fifty-five million, two hundred twenty-six thousand, six hundred twenty-three".