231353434551 has 16 divisors (see below), whose sum is σ = 312920506080. Its totient is φ = 152026076160.

The previous prime is 231353434519. The next prime is 231353434567. The reversal of 231353434551 is 155434353132.

It is not a de Polignac number, because 231353434551 - 2⁵ = 231353434519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231353434591) 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, 1823886 + ... + 1946603.

It is an arithmetic number, because the mean of its divisors is an integer number (19557531630).

Almost surely, 2^231353434551 is an apocalyptic number.

231353434551 is a deficient number, since it is larger than the sum of its proper divisors (81567071529).

231353434551 is a wasteful number, since it uses less digits than its factorization.

231353434551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3770786.

The product of its digits is 324000, while the sum is 39.

Adding to 231353434551 its reverse (155434353132), we get a palindrome (386787787683).

The spelling of 231353434551 in words is "two hundred thirty-one billion, three hundred fifty-three million, four hundred thirty-four thousand, five hundred fifty-one".