431164193906 has 4 divisors (see below), whose sum is σ = 646746290862. Its totient is φ = 215582096952.

The previous prime is 431164193899. The next prime is 431164193917. The reversal of 431164193906 is 609391461134.

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., 216558998881 + 214605195025 = 465359^2 + 463255^2 .

It is a super-2 number, since 2×431164193906² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107791048475 + ... + 107791048478.

Almost surely, 2^431164193906 is an apocalyptic number.

431164193906 is a deficient number, since it is larger than the sum of its proper divisors (215582096956).

431164193906 is a wasteful number, since it uses less digits than its factorization.

431164193906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215582096955.

The product of its (nonzero) digits is 419904, while the sum is 47.

The spelling of 431164193906 in words is "four hundred thirty-one billion, one hundred sixty-four million, one hundred ninety-three thousand, nine hundred six".