31540101213 has 48 divisors (see below), whose sum is σ = 46479068480. Its totient is φ = 18967592448.

The previous prime is 31540101211. The next prime is 31540101269. The reversal of 31540101213 is 31210104513.

It is not a de Polignac number, because 31540101213 - 2¹ = 31540101211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31540101213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31540101211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3494895 + ... + 3503907.

Almost surely, 2^31540101213 is an apocalyptic number.

It is an amenable number.

31540101213 is a deficient number, since it is larger than the sum of its proper divisors (14938967267).

31540101213 is a wasteful number, since it uses less digits than its factorization.

31540101213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9166 (or 9137 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 31540101213 its reverse (31210104513), we get a palindrome (62750205726).

The spelling of 31540101213 in words is "thirty-one billion, five hundred forty million, one hundred one thousand, two hundred thirteen".