31220313423 has 8 divisors (see below), whose sum is σ = 44829168048. Its totient is φ = 19212500544.

The previous prime is 31220313379. The next prime is 31220313431. The reversal of 31220313423 is 32431302213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31220313423 - 2⁶ = 31220313359 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31220313393 and 31220313402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31220313433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 400260390 + ... + 400260467.

It is an arithmetic number, because the mean of its divisors is an integer number (5603646006).

Almost surely, 2^31220313423 is an apocalyptic number.

31220313423 is a deficient number, since it is larger than the sum of its proper divisors (13608854625).

31220313423 is a wasteful number, since it uses less digits than its factorization.

31220313423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800520873.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 31220313423 its reverse (32431302213), we get a palindrome (63651615636).

The spelling of 31220313423 in words is "thirty-one billion, two hundred twenty million, three hundred thirteen thousand, four hundred twenty-three".