1231731413 has 16 divisors (see below), whose sum is σ = 1471815360. Its totient is φ = 1017542400.

The previous prime is 1231731331. The next prime is 1231731427. The reversal of 1231731413 is 3141371321.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1231731413 - 2¹² = 1231727317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231731113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108143 + ... + 118988.

It is an arithmetic number, because the mean of its divisors is an integer number (91988460).

Almost surely, 2^1231731413 is an apocalyptic number.

It is an amenable number.

1231731413 is a deficient number, since it is larger than the sum of its proper divisors (240083947).

1231731413 is a wasteful number, since it uses less digits than its factorization.

1231731413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227188.

The product of its digits is 1512, while the sum is 26.

The square root of 1231731413 is about 35096.0312998493. The cubic root of 1231731413 is about 1071.9437730984.

The spelling of 1231731413 in words is "one billion, two hundred thirty-one million, seven hundred thirty-one thousand, four hundred thirteen".