31202320412 has 48 divisors (see below), whose sum is σ = 55521341568. Its totient is φ = 15342000960.

The previous prime is 31202320411. The next prime is 31202320423. The reversal of 31202320412 is 21402320213.

It is a super-2 number, since 2×31202320412² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31202320411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32948123 + ... + 32949069.

It is an arithmetic number, because the mean of its divisors is an integer number (1156694616).

Almost surely, 2^31202320412 is an apocalyptic number.

It is an amenable number.

31202320412 is a deficient number, since it is larger than the sum of its proper divisors (24319021156).

31202320412 is a wasteful number, since it uses less digits than its factorization.

31202320412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1586 (or 1584 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 31202320412 its reverse (21402320213), we get a palindrome (52604640625).

The spelling of 31202320412 in words is "thirty-one billion, two hundred two million, three hundred twenty thousand, four hundred twelve".