1631131241 has 8 divisors (see below), whose sum is σ = 1638837000. Its totient is φ = 1623444480.

The previous prime is 1631131237. The next prime is 1631131253. The reversal of 1631131241 is 1421311361.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 86955625 + 1544175616 = 9325^2 + 39296^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1631131241 - 2² = 1631131237 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1631131211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184715 + ... + 193343.

It is an arithmetic number, because the mean of its divisors is an integer number (204854625).

Almost surely, 2^1631131241 is an apocalyptic number.

It is an amenable number.

1631131241 is a deficient number, since it is larger than the sum of its proper divisors (7705759).

1631131241 is an equidigital number, since it uses as much as digits as its factorization.

1631131241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9499.

The product of its digits is 432, while the sum is 23.

The square root of 1631131241 is about 40387.2658272382. The cubic root of 1631131241 is about 1177.1441136997.

The spelling of 1631131241 in words is "one billion, six hundred thirty-one million, one hundred thirty-one thousand, two hundred forty-one".