31321031461 has 4 divisors (see below), whose sum is σ = 31373146924. Its totient is φ = 31268916000.

The previous prime is 31321031453. The next prime is 31321031551. The reversal of 31321031461 is 16413012313.

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 29965687236 + 1355344225 = 173106^2 + 36815^2 .

It is a cyclic number.

It is not a de Polignac number, because 31321031461 - 2³ = 31321031453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31321035461) 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, 26056830 + ... + 26058031.

It is an arithmetic number, because the mean of its divisors is an integer number (7843286731).

Almost surely, 2^31321031461 is an apocalyptic number.

It is an amenable number.

31321031461 is a deficient number, since it is larger than the sum of its proper divisors (52115463).

31321031461 is an equidigital number, since it uses as much as digits as its factorization.

31321031461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52115462.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 31321031461 its reverse (16413012313), we get a palindrome (47734043774).

The spelling of 31321031461 in words is "thirty-one billion, three hundred twenty-one million, thirty-one thousand, four hundred sixty-one".