231333533401 has 2 divisors, whose sum is σ = 231333533402. Its totient is φ = 231333533400.

The previous prime is 231333533251. The next prime is 231333533411. The reversal of 231333533401 is 104335333132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 175896360000 + 55437173401 = 419400^2 + 235451^2 .

It is a cyclic number.

It is not a de Polignac number, because 231333533401 - 2⁹ = 231333532889 is a prime.

It is not a weakly prime, because it can be changed into another prime (231333533411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115666766700 + 115666766701.

It is an arithmetic number, because the mean of its divisors is an integer number (115666766701).

Almost surely, 2^231333533401 is an apocalyptic number.

It is an amenable number.

231333533401 is a deficient number, since it is larger than the sum of its proper divisors (1).

231333533401 is an equidigital number, since it uses as much as digits as its factorization.

231333533401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 31.

Adding to 231333533401 its reverse (104335333132), we get a palindrome (335668866533).

The spelling of 231333533401 in words is "two hundred thirty-one billion, three hundred thirty-three million, five hundred thirty-three thousand, four hundred one".