7215525224249 has 2 divisors, whose sum is σ = 7215525224250. Its totient is φ = 7215525224248.

The previous prime is 7215525224221. The next prime is 7215525224261. The reversal of 7215525224249 is 9424225255127.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4615472173225 + 2600053051024 = 2148365^2 + 1612468^2 .

It is a cyclic number.

It is not a de Polignac number, because 7215525224249 - 2²⁴ = 7215508447033 is a prime.

It is a super-2 number, since 2×7215525224249² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7215525224197 and 7215525224206.

It is not a weakly prime, because it can be changed into another prime (7215525224209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3607762612124 + 3607762612125.

It is an arithmetic number, because the mean of its divisors is an integer number (3607762612125).

Almost surely, 2^{7215525224249} is an apocalyptic number.

It is an amenable number.

7215525224249 is a deficient number, since it is larger than the sum of its proper divisors (1).

7215525224249 is an equidigital number, since it uses as much as digits as its factorization.

7215525224249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032000, while the sum is 50.

The spelling of 7215525224249 in words is "seven trillion, two hundred fifteen billion, five hundred twenty-five million, two hundred twenty-four thousand, two hundred forty-nine".