231551431401445 has 8 divisors (see below), whose sum is σ = 277869420659736. Its totient is φ = 185236009802496.

The previous prime is 231551431401427. The next prime is 231551431401473. The reversal of 231551431401445 is 544104134155132.

231551431401445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 97181070938116 + 134370360463329 = 9858046^2 + 11591823^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 231551431401445 - 2³⁵ = 231517071663077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 641716432 + ... + 642077161.

It is an arithmetic number, because the mean of its divisors is an integer number (34733677582467).

Almost surely, 2^{231551431401445} is an apocalyptic number.

It is an amenable number.

231551431401445 is a deficient number, since it is larger than the sum of its proper divisors (46317989258291).

231551431401445 is a wasteful number, since it uses less digits than its factorization.

231551431401445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1283829671.

The product of its (nonzero) digits is 576000, while the sum is 43.

Adding to 231551431401445 its reverse (544104134155132), we get a palindrome (775655565556577).

The spelling of 231551431401445 in words is "two hundred thirty-one trillion, five hundred fifty-one billion, four hundred thirty-one million, four hundred one thousand, four hundred forty-five".