431440202243 has 4 divisors (see below), whose sum is σ = 431577738120. Its totient is φ = 431302666368.

The previous prime is 431440202239. The next prime is 431440202267. The reversal of 431440202243 is 342202044134.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342202044134 = 2 ⋅171101022067.

It is a cyclic number.

It is not a de Polignac number, because 431440202243 - 2² = 431440202239 is a prime.

It is a super-2 number, since 2×431440202243² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (431440202443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68763233 + ... + 68769506.

It is an arithmetic number, because the mean of its divisors is an integer number (107894434530).

Almost surely, 2^431440202243 is an apocalyptic number.

431440202243 is a deficient number, since it is larger than the sum of its proper divisors (137535877).

431440202243 is a wasteful number, since it uses less digits than its factorization.

431440202243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137535876.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 431440202243 its reverse (342202044134), we get a palindrome (773642246377).

The spelling of 431440202243 in words is "four hundred thirty-one billion, four hundred forty million, two hundred two thousand, two hundred forty-three".