31431304230403 has 16 divisors (see below), whose sum is σ = 39266891400960. Its totient is φ = 24442043623200.

The previous prime is 31431304230367. The next prime is 31431304230409. The reversal of 31431304230403 is 30403240313413.

It is not a de Polignac number, because 31431304230403 - 2²¹ = 31431302133251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31431304230409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 415643208 + ... + 415718821.

It is an arithmetic number, because the mean of its divisors is an integer number (2454180712560).

Almost surely, 2^{31431304230403} is an apocalyptic number.

31431304230403 is a deficient number, since it is larger than the sum of its proper divisors (7835587170557).

31431304230403 is a wasteful number, since it uses less digits than its factorization.

31431304230403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831362538.

The product of its (nonzero) digits is 31104, while the sum is 31.

Adding to 31431304230403 its reverse (30403240313413), we get a palindrome (61834544543816).

The spelling of 31431304230403 in words is "thirty-one trillion, four hundred thirty-one billion, three hundred four million, two hundred thirty thousand, four hundred three".