31243401223131 has 8 divisors (see below), whose sum is σ = 41985883009024. Its totient is φ = 20664926793000.

The previous prime is 31243401223127. The next prime is 31243401223171. The reversal of 31243401223131 is 13132210434213.

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

It is not a de Polignac number, because 31243401223131 - 2² = 31243401223127 is a prime.

It is a super-2 number, since 2×31243401223131² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31243401223171) 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, 41001838495 + ... + 41001839256.

It is an arithmetic number, because the mean of its divisors is an integer number (5248235376128).

Almost surely, 2^{31243401223131} is an apocalyptic number.

31243401223131 is a deficient number, since it is larger than the sum of its proper divisors (10742481785893).

31243401223131 is a wasteful number, since it uses less digits than its factorization.

31243401223131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82003677881.

The product of its (nonzero) digits is 10368, while the sum is 30.

Adding to 31243401223131 its reverse (13132210434213), we get a palindrome (44375611657344).

The spelling of 31243401223131 in words is "thirty-one trillion, two hundred forty-three billion, four hundred one million, two hundred twenty-three thousand, one hundred thirty-one".