990231032001 has 16 divisors (see below), whose sum is σ = 1330046305280. Its totient is φ = 655286602320.

The previous prime is 990231031987. The next prime is 990231032009. The reversal of 990231032001 is 100230132099.

It is a happy number.

990231032001 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 990231032001 - 2¹⁴ = 990231015617 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 990231032001.

It is not an unprimeable number, because it can be changed into a prime (990231032009) 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, 2133636 + ... + 2555946.

It is an arithmetic number, because the mean of its divisors is an integer number (83127894080).

Almost surely, 2^990231032001 is an apocalyptic number.

It is an amenable number.

990231032001 is a deficient number, since it is larger than the sum of its proper divisors (339815273279).

990231032001 is a wasteful number, since it uses less digits than its factorization.

990231032001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428076.

The product of its (nonzero) digits is 2916, while the sum is 30.

The spelling of 990231032001 in words is "nine hundred ninety billion, two hundred thirty-one million, thirty-two thousand, one".