31622399889 has 4 divisors (see below), whose sum is σ = 42163199856. Its totient is φ = 21081599924.

The previous prime is 31622399863. The next prime is 31622399891. The reversal of 31622399889 is 98899322613.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31622399889 - 2⁹ = 31622399377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31622399089) 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, 5270399979 + ... + 5270399984.

It is an arithmetic number, because the mean of its divisors is an integer number (10540799964).

Almost surely, 2^31622399889 is an apocalyptic number.

It is an amenable number.

31622399889 is a deficient number, since it is larger than the sum of its proper divisors (10540799967).

31622399889 is a wasteful number, since it uses less digits than its factorization.

31622399889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10540799966.

The product of its digits is 10077696, while the sum is 60.

The spelling of 31622399889 in words is "thirty-one billion, six hundred twenty-two million, three hundred ninety-nine thousand, eight hundred eighty-nine".