7312421565 has 48 divisors (see below), whose sum is σ = 13441676976. Its totient is φ = 3664742400.

The previous prime is 7312421551. The next prime is 7312421569. The reversal of 7312421565 is 5651242137.

7312421565 is a `hidden beast` number, since 73 + 1 + 2 + 4 + 21 + 565 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 16016004 + 7296405561 = 4002^2 + 85419^2 .

It is not a de Polignac number, because 7312421565 - 2¹⁹ = 7311897277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7312421569) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 498435 + ... + 512895.

It is an arithmetic number, because the mean of its divisors is an integer number (280034937).

Almost surely, 2^7312421565 is an apocalyptic number.

It is an amenable number.

7312421565 is a deficient number, since it is larger than the sum of its proper divisors (6129255411).

7312421565 is a wasteful number, since it uses less digits than its factorization.

7312421565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15150 (or 15147 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 7312421565 is about 85512.6982675673. The cubic root of 7312421565 is about 1940.9770793749.

The spelling of 7312421565 in words is "seven billion, three hundred twelve million, four hundred twenty-one thousand, five hundred sixty-five".