990306253231 has 8 divisors (see below), whose sum is σ = 1042739153280. Its totient is φ = 937904505048.

The previous prime is 990306253229. The next prime is 990306253273. The reversal of 990306253231 is 132352603099.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 990306253231 - 2¹ = 990306253229 is a prime.

It is a super-2 number, since 2×990306253231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990306250231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7722691 + ... + 7849876.

It is an arithmetic number, because the mean of its divisors is an integer number (130342394160).

Almost surely, 2^990306253231 is an apocalyptic number.

990306253231 is a deficient number, since it is larger than the sum of its proper divisors (52432900049).

990306253231 is a wasteful number, since it uses less digits than its factorization.

990306253231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15575933.

The product of its (nonzero) digits is 262440, while the sum is 43.

The spelling of 990306253231 in words is "nine hundred ninety billion, three hundred six million, two hundred fifty-three thousand, two hundred thirty-one".