131615391799 has 2 divisors, whose sum is σ = 131615391800. Its totient is φ = 131615391798.

The previous prime is 131615391697. The next prime is 131615391821. The reversal of 131615391799 is 997193516131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131615391799 - 2¹¹ = 131615389751 is a prime.

It is a super-2 number, since 2×131615391799² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131615398799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65807695899 + 65807695900.

It is an arithmetic number, because the mean of its divisors is an integer number (65807695900).

Almost surely, 2^131615391799 is an apocalyptic number.

131615391799 is a deficient number, since it is larger than the sum of its proper divisors (1).

131615391799 is an equidigital number, since it uses as much as digits as its factorization.

131615391799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1377810, while the sum is 55.

The spelling of 131615391799 in words is "one hundred thirty-one billion, six hundred fifteen million, three hundred ninety-one thousand, seven hundred ninety-nine".