320412431 has 4 divisors (see below), whose sum is σ = 322563000. Its totient is φ = 318261864.

The previous prime is 320412427. The next prime is 320412457. The reversal of 320412431 is 134214023.

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

It is a cyclic number.

It is not a de Polignac number, because 320412431 - 2² = 320412427 is a prime.

It is a super-2 number, since 2×320412431² = 205328251878659522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320412461) 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, 1075061 + ... + 1075358.

It is an arithmetic number, because the mean of its divisors is an integer number (80640750).

Almost surely, 2^320412431 is an apocalyptic number.

320412431 is a deficient number, since it is larger than the sum of its proper divisors (2150569).

320412431 is a wasteful number, since it uses less digits than its factorization.

320412431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2150568.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 320412431 is about 17900.0679048991. The cubic root of 320412431 is about 684.2841054712.

Adding to 320412431 its reverse (134214023), we get a palindrome (454626454).

The spelling of 320412431 in words is "three hundred twenty million, four hundred twelve thousand, four hundred thirty-one".