31340243401 has 4 divisors (see below), whose sum is σ = 31403050000. Its totient is φ = 31277436804.

The previous prime is 31340243399. The next prime is 31340243447. The reversal of 31340243401 is 10434204313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10434204313 = 13 ⋅802631101.

It is a cyclic number.

It is not a de Polignac number, because 31340243401 - 2¹ = 31340243399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31340243471) 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, 31402551 + ... + 31403548.

It is an arithmetic number, because the mean of its divisors is an integer number (7850762500).

Almost surely, 2^31340243401 is an apocalyptic number.

It is an amenable number.

31340243401 is a deficient number, since it is larger than the sum of its proper divisors (62806599).

31340243401 is an equidigital number, since it uses as much as digits as its factorization.

31340243401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62806598.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 31340243401 its reverse (10434204313), we get a palindrome (41774447714).

The spelling of 31340243401 in words is "thirty-one billion, three hundred forty million, two hundred forty-three thousand, four hundred one".