31420412431 has 4 divisors (see below), whose sum is σ = 31425649072. Its totient is φ = 31415175792.

The previous prime is 31420412323. The next prime is 31420412437. The reversal of 31420412431 is 13421402413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13421402413 = 67 ⋅200319439.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31420412431 is a prime.

It is a super-2 number, since 2×31420412431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31420412396 and 31420412405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31420412437) 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, 2609310 + ... + 2621323.

It is an arithmetic number, because the mean of its divisors is an integer number (7856412268).

Almost surely, 2^31420412431 is an apocalyptic number.

31420412431 is a deficient number, since it is larger than the sum of its proper divisors (5236641).

31420412431 is an equidigital number, since it uses as much as digits as its factorization.

31420412431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5236640.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 31420412431 its reverse (13421402413), we get a palindrome (44841814844).

The spelling of 31420412431 in words is "thirty-one billion, four hundred twenty million, four hundred twelve thousand, four hundred thirty-one".