7313431 has 4 divisors (see below), whose sum is σ = 7357392. Its totient is φ = 7269472.

The previous prime is 7313429. The next prime is 7313441. The reversal of 7313431 is 1343137.

It is a happy number.

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 7313431 - 2¹ = 7313429 is a prime.

It is a super-2 number, since 2×7313431² = 106972545983522, which contains 22 as substring.

It is a Duffinian number.

7313431 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7313401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21730 + ... + 22063.

It is an arithmetic number, because the mean of its divisors is an integer number (1839348).

Almost surely, 2^7313431 is an apocalyptic number.

7313431 is a deficient number, since it is larger than the sum of its proper divisors (43961).

7313431 is a wasteful number, since it uses less digits than its factorization.

7313431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43960.

The product of its digits is 756, while the sum is 22.

The square root of 7313431 is about 2704.3355930801. The cubic root of 7313431 is about 194.1066388597.

Adding to 7313431 its reverse (1343137), we get a palindrome (8656568).

It can be divided in two parts, 7313 and 431, that added together give a square (7744 = 88²).

The spelling of 7313431 in words is "seven million, three hundred thirteen thousand, four hundred thirty-one".