131213177 has 2 divisors, whose sum is σ = 131213178. Its totient is φ = 131213176.

The previous prime is 131213171. The next prime is 131213249. The reversal of 131213177 is 771312131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72522256 + 58690921 = 8516^2 + 7661^2 .

It is a cyclic number.

It is not a de Polignac number, because 131213177 - 2¹⁸ = 130951033 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131213171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65606588 + 65606589.

It is an arithmetic number, because the mean of its divisors is an integer number (65606589).

Almost surely, 2^131213177 is an apocalyptic number.

It is an amenable number.

131213177 is a deficient number, since it is larger than the sum of its proper divisors (1).

131213177 is an equidigital number, since it uses as much as digits as its factorization.

131213177 is an evil number, because the sum of its binary digits is even.

The product of its digits is 882, while the sum is 26.

The square root of 131213177 is about 11454.8320371798. The cubic root of 131213177 is about 508.1506479138.

The spelling of 131213177 in words is "one hundred thirty-one million, two hundred thirteen thousand, one hundred seventy-seven".