31103432002231 has 12 divisors (see below), whose sum is σ = 32139668129736. Its totient is φ = 30099595444560.

The previous prime is 31103432002193. The next prime is 31103432002241. The reversal of 31103432002231 is 13220023430113.

It is a de Polignac number, because none of the positive numbers 2^k-31103432002231 is a prime.

It is a super-2 number, since 2×31103432002231² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31103432002196 and 31103432002205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31103432002241) 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, 66139081 + ... + 66607693.

It is an arithmetic number, because the mean of its divisors is an integer number (2678305677478).

Almost surely, 2^{31103432002231} is an apocalyptic number.

31103432002231 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

31103432002231 is a deficient number, since it is larger than the sum of its proper divisors (1036236127505).

31103432002231 is an equidigital number, since it uses as much as digits as its factorization.

31103432002231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537742 (or 537711 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 31103432002231 its reverse (13220023430113), we get a palindrome (44323455432344).

The spelling of 31103432002231 in words is "thirty-one trillion, one hundred three billion, four hundred thirty-two million, two thousand, two hundred thirty-one".