31220413423 has 2 divisors, whose sum is σ = 31220413424. Its totient is φ = 31220413422.

The previous prime is 31220413403. The next prime is 31220413489. The reversal of 31220413423 is 32431402213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31220413423 - 2¹³ = 31220405231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31220413403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15610206711 + 15610206712.

It is an arithmetic number, because the mean of its divisors is an integer number (15610206712).

Almost surely, 2^31220413423 is an apocalyptic number.

31220413423 is a deficient number, since it is larger than the sum of its proper divisors (1).

31220413423 is an equidigital number, since it uses as much as digits as its factorization.

31220413423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 31220413423 its reverse (32431402213), we get a palindrome (63651815636).

The spelling of 31220413423 in words is "thirty-one billion, two hundred twenty million, four hundred thirteen thousand, four hundred twenty-three".