3131304431 has 4 divisors (see below), whose sum is σ = 3140277000. Its totient is φ = 3122331864.

The previous prime is 3131304373. The next prime is 3131304457. The reversal of 3131304431 is 1344031313.

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

It is a cyclic number.

It is not a de Polignac number, because 3131304431 - 2²² = 3127110127 is a prime.

It is a super-3 number, since 3×3131304431³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3131304397 and 3131304406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131304131) 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, 4485761 + ... + 4486458.

It is an arithmetic number, because the mean of its divisors is an integer number (785069250).

Almost surely, 2^3131304431 is an apocalyptic number.

3131304431 is a deficient number, since it is larger than the sum of its proper divisors (8972569).

3131304431 is an equidigital number, since it uses as much as digits as its factorization.

3131304431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8972568.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 3131304431 is about 55958.0595714326. The cubic root of 3131304431 is about 1462.9913696615.

Adding to 3131304431 its reverse (1344031313), we get a palindrome (4475335744).

The spelling of 3131304431 in words is "three billion, one hundred thirty-one million, three hundred four thousand, four hundred thirty-one".