51274421207 has 2 divisors, whose sum is σ = 51274421208. Its totient is φ = 51274421206.

The previous prime is 51274421171. The next prime is 51274421221. The reversal of 51274421207 is 70212447215.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51274421207 is a prime.

It is a super-2 number, since 2×51274421207² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51274421267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25637210603 + 25637210604.

It is an arithmetic number, because the mean of its divisors is an integer number (25637210604).

Almost surely, 2^51274421207 is an apocalyptic number.

51274421207 is a deficient number, since it is larger than the sum of its proper divisors (1).

51274421207 is an equidigital number, since it uses as much as digits as its factorization.

51274421207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31360, while the sum is 35.

The spelling of 51274421207 in words is "fifty-one billion, two hundred seventy-four million, four hundred twenty-one thousand, two hundred seven".