243444031431 has 16 divisors (see below), whose sum is σ = 343698020064. Its totient is φ = 152743716864.

The previous prime is 243444031427. The next prime is 243444031639. The reversal of 243444031431 is 134130444342.

It is not a de Polignac number, because 243444031431 - 2² = 243444031427 is a prime.

It is a super-2 number, since 2×243444031431² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243444031392 and 243444031401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243444039431) 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, 1719615 + ... + 1855791.

It is an arithmetic number, because the mean of its divisors is an integer number (21481126254).

Almost surely, 2^243444031431 is an apocalyptic number.

243444031431 is a deficient number, since it is larger than the sum of its proper divisors (100253988633).

243444031431 is a wasteful number, since it uses less digits than its factorization.

243444031431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171250.

The product of its (nonzero) digits is 55296, while the sum is 33.

Adding to 243444031431 its reverse (134130444342), we get a palindrome (377574475773).

The spelling of 243444031431 in words is "two hundred forty-three billion, four hundred forty-four million, thirty-one thousand, four hundred thirty-one".