31211312315432 has 32 divisors (see below), whose sum is σ = 60540477121800. Its totient is φ = 15067208083200.

The previous prime is 31211312315411. The next prime is 31211312315437. The reversal of 31211312315432 is 23451321311213.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 29952262253956 + 1259050061476 = 5472866^2 + 1122074^2 .

It is not an unprimeable number, because it can be changed into a prime (31211312315437) 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, 9625082 + ... + 12452502.

Almost surely, 2^{31211312315432} is an apocalyptic number.

It is an amenable number.

31211312315432 is a deficient number, since it is larger than the sum of its proper divisors (29329164806368).

31211312315432 is a wasteful number, since it uses less digits than its factorization.

31211312315432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2875037 (or 2875033 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

Adding to 31211312315432 its reverse (23451321311213), we get a palindrome (54662633626645).

The spelling of 31211312315432 in words is "thirty-one trillion, two hundred eleven billion, three hundred twelve million, three hundred fifteen thousand, four hundred thirty-two".