31503223423 has 12 divisors (see below), whose sum is σ = 37540428912. Its totient is φ = 26344157280.

The previous prime is 31503223399. The next prime is 31503223439. The reversal of 31503223423 is 32432230513.

It is not a de Polignac number, because 31503223423 - 2²⁵ = 31469668991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31503223391 and 31503223400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31503223463) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7838515 + ... + 7842532.

It is an arithmetic number, because the mean of its divisors is an integer number (3128369076).

Almost surely, 2^31503223423 is an apocalyptic number.

31503223423 is a deficient number, since it is larger than the sum of its proper divisors (6037205489).

31503223423 is a wasteful number, since it uses less digits than its factorization.

31503223423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15681102 (or 15681095 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 28.

Adding to 31503223423 its reverse (32432230513), we get a palindrome (63935453936).

The spelling of 31503223423 in words is "thirty-one billion, five hundred three million, two hundred twenty-three thousand, four hundred twenty-three".