3131420431 has 4 divisors (see below), whose sum is σ = 3169148472. Its totient is φ = 3093692392.

The previous prime is 3131420429. The next prime is 3131420441. The reversal of 3131420431 is 1340241313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1340241313 = 2203 ⋅608371.

It is a cyclic number.

It is not a de Polignac number, because 3131420431 - 2¹ = 3131420429 is a prime.

It is a super-2 number, since 2×3131420431² = 19611587831368451522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131420441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18863896 + ... + 18864061.

It is an arithmetic number, because the mean of its divisors is an integer number (792287118).

Almost surely, 2^3131420431 is an apocalyptic number.

3131420431 is a deficient number, since it is larger than the sum of its proper divisors (37728041).

3131420431 is an equidigital number, since it uses as much as digits as its factorization.

3131420431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37728040.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 3131420431 is about 55959.0960523845. The cubic root of 3131420431 is about 1463.0094350724.

Adding to 3131420431 its reverse (1340241313), we get a palindrome (4471661744).

The spelling of 3131420431 in words is "three billion, one hundred thirty-one million, four hundred twenty thousand, four hundred thirty-one".