131640259 has 2 divisors, whose sum is σ = 131640260. Its totient is φ = 131640258.

The previous prime is 131640253. The next prime is 131640343. The reversal of 131640259 is 952046131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131640259 - 2¹⁵ = 131607491 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131640259.

It is not a weakly prime, because it can be changed into another prime (131640253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65820129 + 65820130.

It is an arithmetic number, because the mean of its divisors is an integer number (65820130).

Almost surely, 2^131640259 is an apocalyptic number.

131640259 is a deficient number, since it is larger than the sum of its proper divisors (1).

131640259 is an equidigital number, since it uses as much as digits as its factorization.

131640259 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 131640259 is about 11473.4588943352. The cubic root of 131640259 is about 508.7013724810.

The spelling of 131640259 in words is "one hundred thirty-one million, six hundred forty thousand, two hundred fifty-nine".