231532535211553 has 4 divisors (see below), whose sum is σ = 231664613099908. Its totient is φ = 231400457323200.

The previous prime is 231532535211533. The next prime is 231532535211643. The reversal of 231532535211553 is 355112535235132.

It is a happy number.

231532535211553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28191979590544 + 203340555621009 = 5309612^2 + 14259753^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231532535211553 is a prime.

It is a super-2 number, since 2×231532535211553² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231532535211533) 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, 66038941548 + ... + 66038945053.

It is an arithmetic number, because the mean of its divisors is an integer number (57916153274977).

Almost surely, 2^{231532535211553} is an apocalyptic number.

It is an amenable number.

231532535211553 is a deficient number, since it is larger than the sum of its proper divisors (132077888355).

231532535211553 is a wasteful number, since it uses less digits than its factorization.

231532535211553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132077888354.

The product of its digits is 2025000, while the sum is 46.

The spelling of 231532535211553 in words is "two hundred thirty-one trillion, five hundred thirty-two billion, five hundred thirty-five million, two hundred eleven thousand, five hundred fifty-three".