31432012331 has 4 divisors (see below), whose sum is σ = 31433101632. Its totient is φ = 31430923032.

The previous prime is 31432012307. The next prime is 31432012349. The reversal of 31432012331 is 13321023413.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31432012331 - 2¹⁸ = 31431750187 is a prime.

It is a super-2 number, since 2×31432012331² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31432012297 and 31432012306.

It is not an unprimeable number, because it can be changed into a prime (31432012301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500156 + ... + 559481.

It is an arithmetic number, because the mean of its divisors is an integer number (7858275408).

Almost surely, 2^31432012331 is an apocalyptic number.

31432012331 is a deficient number, since it is larger than the sum of its proper divisors (1089301).

31432012331 is a wasteful number, since it uses less digits than its factorization.

31432012331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089300.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 31432012331 its reverse (13321023413), we get a palindrome (44753035744).

The spelling of 31432012331 in words is "thirty-one billion, four hundred thirty-two million, twelve thousand, three hundred thirty-one".