1631131 has 6 divisors (see below), whose sum is σ = 1722860. Its totient is φ = 1540008.

The previous prime is 1631117. The next prime is 1631143. The reversal of 1631131 is 1311361.

It is not a de Polignac number, because 1631131 - 2⁹ = 1630619 is a prime.

It is a super-2 number, since 2×1631131² = 5321176678322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1631101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5421 + ... + 5713.

2^1631131 is an apocalyptic number.

1631131 is a deficient number, since it is larger than the sum of its proper divisors (91729).

1631131 is an frugal number, since it uses more digits than its factorization.

1631131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605 (or 312 counting only the distinct ones).

The product of its digits is 54, while the sum is 16.

The square root of 1631131 is about 1277.1573904574. The cubic root of 1631131 is about 117.7144055725.

Adding to 1631131 its reverse (1311361), we get a palindrome (2942492).

The spelling of 1631131 in words is "one million, six hundred thirty-one thousand, one hundred thirty-one".