7213431 has 8 divisors (see below), whose sum is σ = 9949680. Its totient is φ = 4643072.

The previous prime is 7213397. The next prime is 7213441. The reversal of 7213431 is 1343127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7213431 - 2⁷ = 7213303 is a prime.

It is a super-2 number, since 2×7213431² = 104067173583522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7213398 and 7213407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7213441) 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 7 ways as a sum of consecutive naturals, for example, 41370 + ... + 41543.

It is an arithmetic number, because the mean of its divisors is an integer number (1243710).

Almost surely, 2^7213431 is an apocalyptic number.

7213431 is a deficient number, since it is larger than the sum of its proper divisors (2736249).

7213431 is a wasteful number, since it uses less digits than its factorization.

7213431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82945.

The product of its digits is 504, while the sum is 21.

The square root of 7213431 is about 2685.7831260174. The cubic root of 7213431 is about 193.2178716713.

Adding to 7213431 its reverse (1343127), we get a palindrome (8556558).

The spelling of 7213431 in words is "seven million, two hundred thirteen thousand, four hundred thirty-one".