3131491 has 4 divisors (see below), whose sum is σ = 3416184. Its totient is φ = 2846800.

The previous prime is 3131489. The next prime is 3131497. The reversal of 3131491 is 1941313.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 3131491 - 2¹ = 3131489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3131497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142330 + ... + 142351.

It is an arithmetic number, because the mean of its divisors is an integer number (854046).

Almost surely, 2^3131491 is an apocalyptic number.

3131491 is a deficient number, since it is larger than the sum of its proper divisors (284693).

3131491 is a wasteful number, since it uses less digits than its factorization.

3131491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284692.

The product of its digits is 324, while the sum is 22.

The square root of 3131491 is about 1769.6019326391. The cubic root of 3131491 is about 146.3020425009.

The spelling of 3131491 in words is "three million, one hundred thirty-one thousand, four hundred ninety-one".