201231032331 has 16 divisors (see below), whose sum is σ = 306644652800. Its totient is φ = 114986577888.

The previous prime is 201231032287. The next prime is 201231032341. The reversal of 201231032331 is 133230132102.

201231032331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 201231032331 - 2²³ = 201222643723 is a prime.

It is a super-2 number, since 2×201231032331² (a number of 23 digits) contains 22 as substring.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201231032298 and 201231032307.

It is not an unprimeable number, because it can be changed into a prime (201231032341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1244040 + ... + 1396458.

It is an arithmetic number, because the mean of its divisors is an integer number (19165290800).

Almost surely, 2^201231032331 is an apocalyptic number.

201231032331 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

201231032331 is a deficient number, since it is larger than the sum of its proper divisors (105413620469).

201231032331 is a wasteful number, since it uses less digits than its factorization.

201231032331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215298.

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

Adding to 201231032331 its reverse (133230132102), we get a palindrome (334461164433).

The spelling of 201231032331 in words is "two hundred one billion, two hundred thirty-one million, thirty-two thousand, three hundred thirty-one".