31213401023432 has 8 divisors (see below), whose sum is σ = 58525126918950. Its totient is φ = 15606700511712.

The previous prime is 31213401023347. The next prime is 31213401023437. The reversal of 31213401023432 is 23432010431213.

It can be written as a sum of positive squares in only one way, i.e., 18913748812036 + 12299652211396 = 4348994^2 + 3507086^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 31213401023395 and 31213401023404.

It is not an unprimeable number, because it can be changed into a prime (31213401023437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1950837563957 + ... + 1950837563972.

Almost surely, 2^{31213401023432} is an apocalyptic number.

It is an amenable number.

31213401023432 is a deficient number, since it is larger than the sum of its proper divisors (27311725895518).

31213401023432 is a wasteful number, since it uses less digits than its factorization.

31213401023432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3901675127935 (or 3901675127931 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 31213401023432 its reverse (23432010431213), we get a palindrome (54645411454645).

The spelling of 31213401023432 in words is "thirty-one trillion, two hundred thirteen billion, four hundred one million, twenty-three thousand, four hundred thirty-two".