431431222394 has 4 divisors (see below), whose sum is σ = 647146833594. Its totient is φ = 215715611196.

The previous prime is 431431222367. The next prime is 431431222399. The reversal of 431431222394 is 493222134134.

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., 265599021769 + 165832200625 = 515363^2 + 407225^2 .

It is a super-2 number, since 2×431431222394² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (431431222399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107857805597 + ... + 107857805600.

Almost surely, 2^431431222394 is an apocalyptic number.

431431222394 is a deficient number, since it is larger than the sum of its proper divisors (215715611200).

431431222394 is a wasteful number, since it uses less digits than its factorization.

431431222394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215715611199.

The product of its digits is 124416, while the sum is 38.

The spelling of 431431222394 in words is "four hundred thirty-one billion, four hundred thirty-one million, two hundred twenty-two thousand, three hundred ninety-four".