231520554332201 has 4 divisors (see below), whose sum is σ = 232131426507600. Its totient is φ = 230909682156804.

The previous prime is 231520554332153. The next prime is 231520554332293. The reversal of 231520554332201 is 102233455025132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231520554332201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231520554332401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305436087131 + ... + 305436087888.

It is an arithmetic number, because the mean of its divisors is an integer number (58032856626900).

Almost surely, 2^{231520554332201} is an apocalyptic number.

It is an amenable number.

231520554332201 is a deficient number, since it is larger than the sum of its proper divisors (610872175399).

231520554332201 is an equidigital number, since it uses as much as digits as its factorization.

231520554332201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610872175398.

The product of its (nonzero) digits is 216000, while the sum is 38.

The spelling of 231520554332201 in words is "two hundred thirty-one trillion, five hundred twenty billion, five hundred fifty-four million, three hundred thirty-two thousand, two hundred one".