231430143321 has 96 divisors (see below), whose sum is σ = 383973408000. Its totient is φ = 133140547584.

The previous prime is 231430143317. The next prime is 231430143409. The reversal of 231430143321 is 123341034132.

It is a happy number.

231430143321 is a `hidden beast` number, since 2 + 31 + 4 + 301 + 4 + 3 + 321 = 666.

It is not a de Polignac number, because 231430143321 - 2² = 231430143317 is a prime.

It is a super-2 number, since 2×231430143321² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231430148321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 143833965 + ... + 143835573.

It is an arithmetic number, because the mean of its divisors is an integer number (3999723000).

Almost surely, 2^231430143321 is an apocalyptic number.

It is an amenable number.

231430143321 is a deficient number, since it is larger than the sum of its proper divisors (152543264679).

231430143321 is a wasteful number, since it uses less digits than its factorization.

231430143321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2463 (or 2460 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 231430143321 its reverse (123341034132), we get a palindrome (354771177453).

The spelling of 231430143321 in words is "two hundred thirty-one billion, four hundred thirty million, one hundred forty-three thousand, three hundred twenty-one".