231551431341145 has 16 divisors (see below), whose sum is σ = 283361059510272. Its totient is φ = 181581254620480.

The previous prime is 231551431341121. The next prime is 231551431341149. The reversal of 231551431341145 is 541143134155132.

231551431341145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 231551431341145 - 2¹¹ = 231551431339097 is a prime.

It is a super-2 number, since 2×231551431341145² (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 (231551431341149) 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, 395799721 + ... + 396384310.

It is an arithmetic number, because the mean of its divisors is an integer number (17710066219392).

Almost surely, 2^{231551431341145} is an apocalyptic number.

It is an amenable number.

231551431341145 is a deficient number, since it is larger than the sum of its proper divisors (51809628169127).

231551431341145 is a wasteful number, since it uses less digits than its factorization.

231551431341145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792185192.

The product of its digits is 432000, while the sum is 43.

Adding to 231551431341145 its reverse (541143134155132), we get a palindrome (772694565496277).

The spelling of 231551431341145 in words is "two hundred thirty-one trillion, five hundred fifty-one billion, four hundred thirty-one million, three hundred forty-one thousand, one hundred forty-five".