231521004332133 has 16 divisors (see below), whose sum is σ = 317038738843200. Its totient is φ = 150175328472576.

The previous prime is 231521004332131. The next prime is 231521004332227. The reversal of 231521004332133 is 331233400125132.

It is not a de Polignac number, because 231521004332133 - 2¹ = 231521004332131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231521004332094 and 231521004332103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231521004332131) 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, 35475541 + ... + 41491637.

It is an arithmetic number, because the mean of its divisors is an integer number (19814921177700).

Almost surely, 2^{231521004332133} is an apocalyptic number.

It is an amenable number.

231521004332133 is a deficient number, since it is larger than the sum of its proper divisors (85517734511067).

231521004332133 is a wasteful number, since it uses less digits than its factorization.

231521004332133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6362836.

The product of its (nonzero) digits is 38880, while the sum is 33.

Adding to 231521004332133 its reverse (331233400125132), we get a palindrome (562754404457265).

The spelling of 231521004332133 in words is "two hundred thirty-one trillion, five hundred twenty-one billion, four million, three hundred thirty-two thousand, one hundred thirty-three".