133320423231 has 32 divisors (see below), whose sum is σ = 200127651840. Its totient is φ = 88801385400.

The previous prime is 133320423227. The next prime is 133320423251. The reversal of 133320423231 is 132324023331.

133320423231 is a `hidden beast` number, since 1 + 3 + 3 + 3 + 2 + 0 + 423 + 231 = 666.

It is not a de Polignac number, because 133320423231 - 2² = 133320423227 is a prime.

It is a super-2 number, since 2×133320423231² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 133320423195 and 133320423204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133320423211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2490756 + ... + 2543718.

It is an arithmetic number, because the mean of its divisors is an integer number (6253989120).

Almost surely, 2^133320423231 is an apocalyptic number.

133320423231 is a deficient number, since it is larger than the sum of its proper divisors (66807228609).

133320423231 is an frugal number, since it uses more digits than its factorization.

133320423231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54135 (or 54117 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 27.

Adding to 133320423231 its reverse (132324023331), we get a palindrome (265644446562).

The spelling of 133320423231 in words is "one hundred thirty-three billion, three hundred twenty million, four hundred twenty-three thousand, two hundred thirty-one".