7313220431 has 4 divisors (see below), whose sum is σ = 7978058664. Its totient is φ = 6648382200.

The previous prime is 7313220419. The next prime is 7313220437. The reversal of 7313220431 is 1340223137.

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 7313220431 - 2⁶ = 7313220367 is a prime.

It is a super-2 number, since 2×7313220431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7313220431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7313220437) 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, 332419100 + ... + 332419121.

It is an arithmetic number, because the mean of its divisors is an integer number (1994514666).

Almost surely, 2^7313220431 is an apocalyptic number.

7313220431 is a deficient number, since it is larger than the sum of its proper divisors (664838233).

7313220431 is a wasteful number, since it uses less digits than its factorization.

7313220431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664838232.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 7313220431 is about 85517.3691772613. The cubic root of 7313220431 is about 1941.0477592957.

Adding to 7313220431 its reverse (1340223137), we get a palindrome (8653443568).

The spelling of 7313220431 in words is "seven billion, three hundred thirteen million, two hundred twenty thousand, four hundred thirty-one".