31042240403 has 4 divisors (see below), whose sum is σ = 31093381440. Its totient is φ = 30991099368.

The previous prime is 31042240399. The next prime is 31042240441. The reversal of 31042240403 is 30404224013.

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

It is a cyclic number.

It is not a de Polignac number, because 31042240403 - 2² = 31042240399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31042240003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25569608 + ... + 25570821.

It is an arithmetic number, because the mean of its divisors is an integer number (7773345360).

Almost surely, 2^31042240403 is an apocalyptic number.

31042240403 is a deficient number, since it is larger than the sum of its proper divisors (51141037).

31042240403 is an equidigital number, since it uses as much as digits as its factorization.

31042240403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51141036.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 31042240403 its reverse (30404224013), we get a palindrome (61446464416).

The spelling of 31042240403 in words is "thirty-one billion, forty-two million, two hundred forty thousand, four hundred three".