431443404242 has 4 divisors (see below), whose sum is σ = 647165106366. Its totient is φ = 215721702120.

The previous prime is 431443404179. The next prime is 431443404251. The reversal of 431443404242 is 242404344134.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242404344134 = 2 ⋅121202172067.

It can be written as a sum of positive squares in only one way, i.e., 430374048841 + 1069355401 = 656029^2 + 32701^2 .

It is a super-2 number, since 2×431443404242² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107860851059 + ... + 107860851062.

Almost surely, 2^431443404242 is an apocalyptic number.

431443404242 is a deficient number, since it is larger than the sum of its proper divisors (215721702124).

431443404242 is a wasteful number, since it uses less digits than its factorization.

431443404242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215721702123.

The product of its (nonzero) digits is 147456, while the sum is 35.

Adding to 431443404242 its reverse (242404344134), we get a palindrome (673847748376).

The spelling of 431443404242 in words is "four hundred thirty-one billion, four hundred forty-three million, four hundred four thousand, two hundred forty-two".