7320431 has 4 divisors (see below), whose sum is σ = 7334952. Its totient is φ = 7305912.

The previous prime is 7320419. The next prime is 7320437. The reversal of 7320431 is 1340237.

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 7320431 - 2¹⁸ = 7058287 is a prime.

It is a super-2 number, since 2×7320431² = 107177420051522, 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 (7320437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6476 + ... + 7521.

It is an arithmetic number, because the mean of its divisors is an integer number (1833738).

Almost surely, 2^7320431 is an apocalyptic number.

7320431 is a deficient number, since it is larger than the sum of its proper divisors (14521).

7320431 is a wasteful number, since it uses less digits than its factorization.

7320431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14520.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 7320431 is about 2705.6295016133. The cubic root of 7320431 is about 194.1685483883.

Adding to 7320431 its reverse (1340237), we get a palindrome (8660668).

The spelling of 7320431 in words is "seven million, three hundred twenty thousand, four hundred thirty-one".