51631713227 has 4 divisors (see below), whose sum is σ = 51660225096. Its totient is φ = 51603201360.

The previous prime is 51631713223. The next prime is 51631713253. The reversal of 51631713227 is 72231713615.

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 51631713227 - 2² = 51631713223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51631713223) 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, 14253218 + ... + 14256839.

It is an arithmetic number, because the mean of its divisors is an integer number (12915056274).

Almost surely, 2^51631713227 is an apocalyptic number.

51631713227 is a deficient number, since it is larger than the sum of its proper divisors (28511869).

51631713227 is a wasteful number, since it uses less digits than its factorization.

51631713227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28511868.

The product of its digits is 52920, while the sum is 38.

The spelling of 51631713227 in words is "fifty-one billion, six hundred thirty-one million, seven hundred thirteen thousand, two hundred twenty-seven".