231533454051221 has 8 divisors (see below), whose sum is σ = 264609799316544. Its totient is φ = 198457143171840.

The previous prime is 231533454051209. The next prime is 231533454051223. The reversal of 231533454051221 is 122150454335132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231533454051221 - 2⁶ = 231533454051157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231533454051223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7957301 + ... + 22943093.

It is an arithmetic number, because the mean of its divisors is an integer number (33076224914568).

Almost surely, 2^{231533454051221} is an apocalyptic number.

It is an amenable number.

231533454051221 is a deficient number, since it is larger than the sum of its proper divisors (33076345265323).

231533454051221 is a wasteful number, since it uses less digits than its factorization.

231533454051221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17192971.

The product of its (nonzero) digits is 432000, while the sum is 41.

The spelling of 231533454051221 in words is "two hundred thirty-one trillion, five hundred thirty-three billion, four hundred fifty-four million, fifty-one thousand, two hundred twenty-one".