31201243403 has 16 divisors (see below), whose sum is σ = 36299249280. Its totient is φ = 26504169600.

The previous prime is 31201243397. The next prime is 31201243477. The reversal of 31201243403 is 30434210213.

It is not a de Polignac number, because 31201243403 - 2¹⁰ = 31201242379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31201243303) 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, 574193 + ... + 626178.

It is an arithmetic number, because the mean of its divisors is an integer number (2268703080).

Almost surely, 2^31201243403 is an apocalyptic number.

31201243403 is a deficient number, since it is larger than the sum of its proper divisors (5098005877).

31201243403 is a wasteful number, since it uses less digits than its factorization.

31201243403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200538.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 31201243403 its reverse (30434210213), we get a palindrome (61635453616).

The spelling of 31201243403 in words is "thirty-one billion, two hundred one million, two hundred forty-three thousand, four hundred three".