7312263721 has 8 divisors (see below), whose sum is σ = 8357581440. Its totient is φ = 6267123168.

The previous prime is 7312263683. The next prime is 7312263743. The reversal of 7312263721 is 1273622137.

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 7312263721 - 2¹¹ = 7312261673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7312263421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60780 + ... + 135346.

It is an arithmetic number, because the mean of its divisors is an integer number (1044697680).

Almost surely, 2^7312263721 is an apocalyptic number.

It is an amenable number.

7312263721 is a deficient number, since it is larger than the sum of its proper divisors (1045317719).

7312263721 is a wasteful number, since it uses less digits than its factorization.

7312263721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88583.

The product of its digits is 21168, while the sum is 34.

The square root of 7312263721 is about 85511.7753353303. The cubic root of 7312263721 is about 1940.9631134682.

Adding to 7312263721 its reverse (1273622137), we get a palindrome (8585885858).

The spelling of 7312263721 in words is "seven billion, three hundred twelve million, two hundred sixty-three thousand, seven hundred twenty-one".