999999056231 has 8 divisors (see below), whose sum is σ = 1144968556704. Its totient is φ = 855557678880.

The previous prime is 999999056197. The next prime is 999999056261. The reversal of 999999056231 is 132650999999.

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 999999056231 - 2¹⁰ = 999999055207 is a prime.

It is a super-2 number, since 2×999999056231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999999056261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132026720 + ... + 132034293.

It is an arithmetic number, because the mean of its divisors is an integer number (143121069588).

Almost surely, 2^999999056231 is an apocalyptic number.

999999056231 is a deficient number, since it is larger than the sum of its proper divisors (144969500473).

999999056231 is a wasteful number, since it uses less digits than its factorization.

999999056231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264061561.

The product of its (nonzero) digits is 95659380, while the sum is 71.

The spelling of 999999056231 in words is "nine hundred ninety-nine billion, nine hundred ninety-nine million, fifty-six thousand, two hundred thirty-one".