31220414413 has 4 divisors (see below), whose sum is σ = 31221072988. Its totient is φ = 31219755840.

The previous prime is 31220414387. The next prime is 31220414431. The reversal of 31220414413 is 31441402213.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9647561284 + 21572853129 = 98222^2 + 146877^2 .

It is a cyclic number.

It is not a de Polignac number, because 31220414413 - 2²¹ = 31218317261 is a prime.

It is a super-2 number, since 2×31220414413² (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 (31220414513) 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, 252156 + ... + 354997.

It is an arithmetic number, because the mean of its divisors is an integer number (7805268247).

Almost surely, 2^31220414413 is an apocalyptic number.

It is an amenable number.

31220414413 is a deficient number, since it is larger than the sum of its proper divisors (658575).

31220414413 is an equidigital number, since it uses as much as digits as its factorization.

31220414413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658574.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 31220414413 its reverse (31441402213), we get a palindrome (62661816626).

The spelling of 31220414413 in words is "thirty-one billion, two hundred twenty million, four hundred fourteen thousand, four hundred thirteen".