131155430477 has 2 divisors, whose sum is σ = 131155430478. Its totient is φ = 131155430476.

The previous prime is 131155430387. The next prime is 131155430489. The reversal of 131155430477 is 774034551131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85337599876 + 45817830601 = 292126^2 + 214051^2 .

It is a cyclic number.

It is not a de Polignac number, because 131155430477 - 2²⁰ = 131154381901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131155430177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65577715238 + 65577715239.

It is an arithmetic number, because the mean of its divisors is an integer number (65577715239).

Almost surely, 2^131155430477 is an apocalyptic number.

It is an amenable number.

131155430477 is a deficient number, since it is larger than the sum of its proper divisors (1).

131155430477 is an equidigital number, since it uses as much as digits as its factorization.

131155430477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 176400, while the sum is 41.

The spelling of 131155430477 in words is "one hundred thirty-one billion, one hundred fifty-five million, four hundred thirty thousand, four hundred seventy-seven".