51226697957 has 4 divisors (see below), whose sum is σ = 51305874336. Its totient is φ = 51147521580.

The previous prime is 51226697939. The next prime is 51226697983. The reversal of 51226697957 is 75979662215.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51226697957 - 2⁸ = 51226697701 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51226697896 and 51226697905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51226697917) 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, 39587219 + ... + 39588512.

It is an arithmetic number, because the mean of its divisors is an integer number (12826468584).

Almost surely, 2^51226697957 is an apocalyptic number.

It is an amenable number.

51226697957 is a deficient number, since it is larger than the sum of its proper divisors (79176379).

51226697957 is an equidigital number, since it uses as much as digits as its factorization.

51226697957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79176378.

The product of its digits is 14288400, while the sum is 59.

The spelling of 51226697957 in words is "fifty-one billion, two hundred twenty-six million, six hundred ninety-seven thousand, nine hundred fifty-seven".