961223233231 has 4 divisors (see below), whose sum is σ = 963993329352. Its totient is φ = 958453137112.

The previous prime is 961223233219. The next prime is 961223233237. The reversal of 961223233231 is 132332322169.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 961223233231 - 2¹¹ = 961223231183 is a prime.

It is a super-2 number, since 2×961223233231² (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 (961223233237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1385047540 + ... + 1385048233.

It is an arithmetic number, because the mean of its divisors is an integer number (240998332338).

Almost surely, 2^961223233231 is an apocalyptic number.

961223233231 is a deficient number, since it is larger than the sum of its proper divisors (2770096121).

961223233231 is a wasteful number, since it uses less digits than its factorization.

961223233231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2770096120.

The product of its digits is 69984, while the sum is 37.

The spelling of 961223233231 in words is "nine hundred sixty-one billion, two hundred twenty-three million, two hundred thirty-three thousand, two hundred thirty-one".