231515442452444 has 12 divisors (see below), whose sum is σ = 406114380646968. Its totient is φ = 115482762267600.

The previous prime is 231515442452429. The next prime is 231515442452453. The reversal of 231515442452444 is 444254244515132.

It is a junction number, because it is equal to n+sod(n) for n = 231515442452392 and 231515442452401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68739737762 + ... + 68739741129.

It is an arithmetic number, because the mean of its divisors is an integer number (33842865053914).

Almost surely, 2^{231515442452444} is an apocalyptic number.

It is an amenable number.

231515442452444 is a deficient number, since it is larger than the sum of its proper divisors (174598938194524).

231515442452444 is a wasteful number, since it uses less digits than its factorization.

231515442452444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137479479316 (or 137479479314 counting only the distinct ones).

The product of its digits is 12288000, while the sum is 50.

Adding to 231515442452444 its reverse (444254244515132), we get a palindrome (675769686967576).

The spelling of 231515442452444 in words is "two hundred thirty-one trillion, five hundred fifteen billion, four hundred forty-two million, four hundred fifty-two thousand, four hundred forty-four".