31131422461 has 8 divisors (see below), whose sum is σ = 34194697920. Its totient is φ = 28210624992.

The previous prime is 31131422359. The next prime is 31131422501. The reversal of 31131422461 is 16422413113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31131422461 - 2²¹ = 31129325309 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 (31131492461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35619040 + ... + 35619913.

It is an arithmetic number, because the mean of its divisors is an integer number (4274337240).

Almost surely, 2^31131422461 is an apocalyptic number.

It is an amenable number.

31131422461 is a deficient number, since it is larger than the sum of its proper divisors (3063275459).

31131422461 is a wasteful number, since it uses less digits than its factorization.

31131422461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71238995.

The product of its digits is 3456, while the sum is 28.

Adding to 31131422461 its reverse (16422413113), we get a palindrome (47553835574).

The spelling of 31131422461 in words is "thirty-one billion, one hundred thirty-one million, four hundred twenty-two thousand, four hundred sixty-one".