231200233131 has 16 divisors (see below), whose sum is σ = 352924300800. Its totient is φ = 131882225088.

The previous prime is 231200233129. The next prime is 231200233151. The reversal of 231200233131 is 131332002132.

It is not a de Polignac number, because 231200233131 - 2¹ = 231200233129 is a prime.

It is a super-2 number, since 2×231200233131² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 231200233098 and 231200233107.

It is not an unprimeable number, because it can be changed into a prime (231200233111) 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, 9662511 + ... + 9686408.

It is an arithmetic number, because the mean of its divisors is an integer number (22057768800).

Almost surely, 2^231200233131 is an apocalyptic number.

231200233131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

231200233131 is a deficient number, since it is larger than the sum of its proper divisors (121724067669).

231200233131 is a wasteful number, since it uses less digits than its factorization.

231200233131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19349498.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 231200233131 its reverse (131332002132), we get a palindrome (362532235263).

The spelling of 231200233131 in words is "two hundred thirty-one billion, two hundred million, two hundred thirty-three thousand, one hundred thirty-one".