31423222987 has 16 divisors (see below), whose sum is σ = 33975585280. Its totient is φ = 28890382752.

The previous prime is 31423222951. The next prime is 31423223003. The reversal of 31423222987 is 78922232413.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31423222987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31423222087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4209064 + ... + 4216522.

It is an arithmetic number, because the mean of its divisors is an integer number (2123474080).

Almost surely, 2^31423222987 is an apocalyptic number.

31423222987 is a deficient number, since it is larger than the sum of its proper divisors (2552362293).

31423222987 is a wasteful number, since it uses less digits than its factorization.

31423222987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8722.

The product of its digits is 290304, while the sum is 43.

The spelling of 31423222987 in words is "thirty-one billion, four hundred twenty-three million, two hundred twenty-two thousand, nine hundred eighty-seven".