31411122013 has 4 divisors (see below), whose sum is σ = 31417680348. Its totient is φ = 31404563680.

The previous prime is 31411121977. The next prime is 31411122019. The reversal of 31411122013 is 31022111413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31022111413 = 281 ⋅110398973.

It can be written as a sum of positive squares in 2 ways, for example, as 29376931609 + 2034190404 = 171397^2 + 45102^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31411122013 is a prime.

It is a super-2 number, since 2×31411122013² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31411122019) 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, 3271978 + ... + 3281563.

It is an arithmetic number, because the mean of its divisors is an integer number (7854420087).

Almost surely, 2^31411122013 is an apocalyptic number.

It is an amenable number.

31411122013 is a deficient number, since it is larger than the sum of its proper divisors (6558335).

31411122013 is an equidigital number, since it uses as much as digits as its factorization.

31411122013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6558334.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 31411122013 its reverse (31022111413), we get a palindrome (62433233426).

The spelling of 31411122013 in words is "thirty-one billion, four hundred eleven million, one hundred twenty-two thousand, thirteen".