51197901311 has 2 divisors, whose sum is σ = 51197901312. Its totient is φ = 51197901310.

The previous prime is 51197901283. The next prime is 51197901329. The reversal of 51197901311 is 11310979115.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51197901311 - 2¹⁸ = 51197639167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51197901371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25598950655 + 25598950656.

It is an arithmetic number, because the mean of its divisors is an integer number (25598950656).

Almost surely, 2^51197901311 is an apocalyptic number.

51197901311 is a deficient number, since it is larger than the sum of its proper divisors (1).

51197901311 is an equidigital number, since it uses as much as digits as its factorization.

51197901311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8505, while the sum is 38.

The spelling of 51197901311 in words is "fifty-one billion, one hundred ninety-seven million, nine hundred one thousand, three hundred eleven".