31303011223 has 4 divisors (see below), whose sum is σ = 34148739528. Its totient is φ = 28457282920.

The previous prime is 31303011211. The next prime is 31303011283. The reversal of 31303011223 is 32211030313.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 31303011223 - 2²⁹ = 30766140311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31303011223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31303011283) 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 in 3 ways as a sum of consecutive naturals, for example, 1422864136 + ... + 1422864157.

It is an arithmetic number, because the mean of its divisors is an integer number (8537184882).

Almost surely, 2^31303011223 is an apocalyptic number.

31303011223 is a deficient number, since it is larger than the sum of its proper divisors (2845728305).

31303011223 is a wasteful number, since it uses less digits than its factorization.

31303011223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2845728304.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31303011223 its reverse (32211030313), we get a palindrome (63514041536).

The spelling of 31303011223 in words is "thirty-one billion, three hundred three million, eleven thousand, two hundred twenty-three".