31602212643 has 4 divisors (see below), whose sum is σ = 42136283528. Its totient is φ = 21068141760.

The previous prime is 31602212563. The next prime is 31602212647. The reversal of 31602212643 is 34621220613.

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

It is not a de Polignac number, because 31602212643 - 2³⁴ = 14422343459 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31602212643.

It is not an unprimeable number, because it can be changed into a prime (31602212647) 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, 5267035438 + ... + 5267035443.

It is an arithmetic number, because the mean of its divisors is an integer number (10534070882).

Almost surely, 2^31602212643 is an apocalyptic number.

31602212643 is a deficient number, since it is larger than the sum of its proper divisors (10534070885).

31602212643 is a wasteful number, since it uses less digits than its factorization.

31602212643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10534070884.

The product of its (nonzero) digits is 10368, while the sum is 30.

The spelling of 31602212643 in words is "thirty-one billion, six hundred two million, two hundred twelve thousand, six hundred forty-three".