231554312534 has 4 divisors (see below), whose sum is σ = 347331468804. Its totient is φ = 115777156266.

The previous prime is 231554312527. The next prime is 231554312537. The reversal of 231554312534 is 435213455132.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231554312537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57888578132 + ... + 57888578135.

It is an arithmetic number, because the mean of its divisors is an integer number (86832867201).

Almost surely, 2^231554312534 is an apocalyptic number.

231554312534 is a deficient number, since it is larger than the sum of its proper divisors (115777156270).

231554312534 is a wasteful number, since it uses less digits than its factorization.

231554312534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115777156269.

The product of its digits is 216000, while the sum is 38.

Adding to 231554312534 its reverse (435213455132), we get a palindrome (666767767666).

The spelling of 231554312534 in words is "two hundred thirty-one billion, five hundred fifty-four million, three hundred twelve thousand, five hundred thirty-four".