231533453533551 has 16 divisors (see below), whose sum is σ = 332467256195424. Its totient is φ = 142478283561984.

The previous prime is 231533453533517. The next prime is 231533453533559. The reversal of 231533453533551 is 155335354335132.

It is not a de Polignac number, because 231533453533551 - 2⁷ = 231533453533423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231533453533494 and 231533453533503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231533453533559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78569866 + ... + 81463431.

It is an arithmetic number, because the mean of its divisors is an integer number (20779203512214).

Almost surely, 2^{231533453533551} is an apocalyptic number.

231533453533551 is a deficient number, since it is larger than the sum of its proper divisors (100933802661873).

231533453533551 is a wasteful number, since it uses less digits than its factorization.

231533453533551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160070410.

The product of its digits is 18225000, while the sum is 51.

The spelling of 231533453533551 in words is "two hundred thirty-one trillion, five hundred thirty-three billion, four hundred fifty-three million, five hundred thirty-three thousand, five hundred fifty-one".