31213301431 has 8 divisors (see below), whose sum is σ = 34773439680. Its totient is φ = 27818751072.

The previous prime is 31213301423. The next prime is 31213301453. The reversal of 31213301431 is 13410331213.

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 31213301431 - 2³ = 31213301423 is a prime.

It is a super-2 number, since 2×31213301431² (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 (31213301131) 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, 41396575 + ... + 41397328.

It is an arithmetic number, because the mean of its divisors is an integer number (4346679960).

Almost surely, 2^31213301431 is an apocalyptic number.

31213301431 is a deficient number, since it is larger than the sum of its proper divisors (3560138249).

31213301431 is a wasteful number, since it uses less digits than its factorization.

31213301431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82793945.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 31213301431 its reverse (13410331213), we get a palindrome (44623632644).

The spelling of 31213301431 in words is "thirty-one billion, two hundred thirteen million, three hundred one thousand, four hundred thirty-one".