231533420145445 has 24 divisors (see below), whose sum is σ = 305400358779768. Its totient is φ = 168384708581760.

The previous prime is 231533420145407. The next prime is 231533420145449. The reversal of 231533420145445 is 544541024335132.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 46458101376324 + 185075318769121 = 6816018^2 + 13604239^2 .

It is not a de Polignac number, because 231533420145445 - 2⁹ = 231533420144933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231533420145395 and 231533420145404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231533420145449) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28086039 + ... + 35382091.

It is an arithmetic number, because the mean of its divisors is an integer number (12725014949157).

Almost surely, 2^{231533420145445} is an apocalyptic number.

It is an amenable number.

231533420145445 is a deficient number, since it is larger than the sum of its proper divisors (73866938634323).

231533420145445 is a wasteful number, since it uses less digits than its factorization.

231533420145445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7348533 (or 7348522 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 46.

The spelling of 231533420145445 in words is "two hundred thirty-one trillion, five hundred thirty-three billion, four hundred twenty million, one hundred forty-five thousand, four hundred forty-five".