231551540455 has 8 divisors (see below), whose sum is σ = 278045750304. Its totient is φ = 185118631200.

The previous prime is 231551540443. The next prime is 231551540459. The reversal of 231551540455 is 554045155132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231551540455 - 2¹⁵ = 231551507687 is a prime.

It is a super-2 number, since 2×231551540455² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231551540459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15316836 + ... + 15331945.

It is an arithmetic number, because the mean of its divisors is an integer number (34755718788).

Almost surely, 2^231551540455 is an apocalyptic number.

231551540455 is a deficient number, since it is larger than the sum of its proper divisors (46494209849).

231551540455 is a wasteful number, since it uses less digits than its factorization.

231551540455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30650297.

The product of its (nonzero) digits is 300000, while the sum is 40.

Adding to 231551540455 its reverse (554045155132), we get a palindrome (785596695587).

The spelling of 231551540455 in words is "two hundred thirty-one billion, five hundred fifty-one million, five hundred forty thousand, four hundred fifty-five".