431400623242 has 4 divisors (see below), whose sum is σ = 647100934866. Its totient is φ = 215700311620.

The previous prime is 431400623239. The next prime is 431400623263. The reversal of 431400623242 is 242326004134.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 347862860401 + 83537762841 = 589799^2 + 289029^2 .

It is a super-2 number, since 2×431400623242² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 107850155809 + ... + 107850155812.

Almost surely, 2^431400623242 is an apocalyptic number.

431400623242 is a deficient number, since it is larger than the sum of its proper divisors (215700311624).

431400623242 is a wasteful number, since it uses less digits than its factorization.

431400623242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215700311623.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 431400623242 its reverse (242326004134), we get a palindrome (673726627376).

The spelling of 431400623242 in words is "four hundred thirty-one billion, four hundred million, six hundred twenty-three thousand, two hundred forty-two".