231513450042321 has 24 divisors (see below), whose sum is σ = 336540976532904. Its totient is φ = 153358011106560.

The previous prime is 231513450042271. The next prime is 231513450042341. The reversal of 231513450042321 is 123240054315132.

231513450042321 is a `hidden beast` number, since 2 + 3 + 1 + 51 + 34 + 500 + 42 + 32 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 145538551812096 + 85974898230225 = 12063936^2 + 9272265^2 .

It is not a de Polignac number, because 231513450042321 - 2¹⁰ = 231513450041297 is a prime.

It is a super-2 number, since 2×231513450042321² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231513450042341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 199214581 + ... + 200373341.

It is an arithmetic number, because the mean of its divisors is an integer number (14022540688871).

Almost surely, 2^{231513450042321} is an apocalyptic number.

It is an amenable number.

231513450042321 is a deficient number, since it is larger than the sum of its proper divisors (105027526490583).

231513450042321 is a wasteful number, since it uses less digits than its factorization.

231513450042321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300321 (or 1300318 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 231513450042321 in words is "two hundred thirty-one trillion, five hundred thirteen billion, four hundred fifty million, forty-two thousand, three hundred twenty-one".