7224521537 has 2 divisors, whose sum is σ = 7224521538. Its totient is φ = 7224521536.

The previous prime is 7224521527. The next prime is 7224521581. The reversal of 7224521537 is 7351254227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7185783361 + 38738176 = 84769^2 + 6224^2 .

It is a cyclic number.

It is not a de Polignac number, because 7224521537 - 2²⁰ = 7223472961 is a prime.

It is a super-2 number, since 2×7224521537² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7224521537.

It is not a weakly prime, because it can be changed into another prime (7224521527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3612260768 + 3612260769.

It is an arithmetic number, because the mean of its divisors is an integer number (3612260769).

Almost surely, 2^7224521537 is an apocalyptic number.

It is an amenable number.

7224521537 is a deficient number, since it is larger than the sum of its proper divisors (1).

7224521537 is an equidigital number, since it uses as much as digits as its factorization.

7224521537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 117600, while the sum is 38.

The square root of 7224521537 is about 84997.1854651670. The cubic root of 7224521537 is about 1933.1684411456.

The spelling of 7224521537 in words is "seven billion, two hundred twenty-four million, five hundred twenty-one thousand, five hundred thirty-seven".