31331413427 has 2 divisors, whose sum is σ = 31331413428. Its totient is φ = 31331413426.

The previous prime is 31331413291. The next prime is 31331413429. The reversal of 31331413427 is 72431413313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31331413427 - 2²⁰ = 31330364851 is a prime.

Together with 31331413429, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 31331413393 and 31331413402.

It is not a weakly prime, because it can be changed into another prime (31331413429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15665706713 + 15665706714.

It is an arithmetic number, because the mean of its divisors is an integer number (15665706714).

Almost surely, 2^31331413427 is an apocalyptic number.

31331413427 is a deficient number, since it is larger than the sum of its proper divisors (1).

31331413427 is an equidigital number, since it uses as much as digits as its factorization.

31331413427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 32.

The spelling of 31331413427 in words is "thirty-one billion, three hundred thirty-one million, four hundred thirteen thousand, four hundred twenty-seven".