31220501423 has 2 divisors, whose sum is σ = 31220501424. Its totient is φ = 31220501422.

The previous prime is 31220501387. The next prime is 31220501449. The reversal of 31220501423 is 32410502213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31220501423 - 2⁶ = 31220501359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31220501723) 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 as a sum of consecutive naturals, namely, 15610250711 + 15610250712.

It is an arithmetic number, because the mean of its divisors is an integer number (15610250712).

Almost surely, 2^31220501423 is an apocalyptic number.

31220501423 is a deficient number, since it is larger than the sum of its proper divisors (1).

31220501423 is an equidigital number, since it uses as much as digits as its factorization.

31220501423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 23.

The spelling of 31220501423 in words is "thirty-one billion, two hundred twenty million, five hundred one thousand, four hundred twenty-three".