31680361043 has 4 divisors (see below), whose sum is σ = 31781576568. Its totient is φ = 31579145520.

The previous prime is 31680360979. The next prime is 31680361049. The reversal of 31680361043 is 34016308613.

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 31680361043 - 2⁶ = 31680360979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31680360994 and 31680361012.

It is not an unprimeable number, because it can be changed into a prime (31680361049) 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, 50607293 + ... + 50607918.

It is an arithmetic number, because the mean of its divisors is an integer number (7945394142).

Almost surely, 2^31680361043 is an apocalyptic number.

31680361043 is a deficient number, since it is larger than the sum of its proper divisors (101215525).

31680361043 is a wasteful number, since it uses less digits than its factorization.

31680361043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101215524.

The product of its (nonzero) digits is 31104, while the sum is 35.

Adding to 31680361043 its reverse (34016308613), we get a palindrome (65696669656).

The spelling of 31680361043 in words is "thirty-one billion, six hundred eighty million, three hundred sixty-one thousand, forty-three".