131213223166477 has 2 divisors, whose sum is σ = 131213223166478. Its totient is φ = 131213223166476.

The previous prime is 131213223166457. The next prime is 131213223166541. The reversal of 131213223166477 is 774661322312131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128999870711721 + 2213352454756 = 11357811^2 + 1487734^2 .

It is an emirp because it is prime and its reverse (774661322312131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131213223166477 - 2²⁷ = 131213088948749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131213223166477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131213223166457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65606611583238 + 65606611583239.

It is an arithmetic number, because the mean of its divisors is an integer number (65606611583239).

Almost surely, 2^{131213223166477} is an apocalyptic number.

It is an amenable number.

131213223166477 is a deficient number, since it is larger than the sum of its proper divisors (1).

131213223166477 is an equidigital number, since it uses as much as digits as its factorization.

131213223166477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1524096, while the sum is 49.

The spelling of 131213223166477 in words is "one hundred thirty-one trillion, two hundred thirteen billion, two hundred twenty-three million, one hundred sixty-six thousand, four hundred seventy-seven".