31333001011989 has 16 divisors (see below), whose sum is σ = 42011223505920. Its totient is φ = 20771725685360.

The previous prime is 31333001011901. The next prime is 31333001011997. The reversal of 31333001011989 is 98911010033313.

It is a cyclic number.

It is not a de Polignac number, because 31333001011989 - 2¹³ = 31333001003797 is a prime.

It is a super-2 number, since 2×31333001011989² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31333001011989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31333001011589) 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, 52828894 + ... + 53418704.

It is an arithmetic number, because the mean of its divisors is an integer number (2625701469120).

Almost surely, 2^{31333001011989} is an apocalyptic number.

It is an amenable number.

31333001011989 is a deficient number, since it is larger than the sum of its proper divisors (10678222493931).

31333001011989 is a wasteful number, since it uses less digits than its factorization.

31333001011989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688920.

The product of its (nonzero) digits is 52488, while the sum is 42.

The spelling of 31333001011989 in words is "thirty-one trillion, three hundred thirty-three billion, one million, eleven thousand, nine hundred eighty-nine".