8513225537 has 2 divisors, whose sum is σ = 8513225538. Its totient is φ = 8513225536.

The previous prime is 8513225531. The next prime is 8513225563. The reversal of 8513225537 is 7355223158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5340832561 + 3172392976 = 73081^2 + 56324^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8513225537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8513225494 and 8513225503.

It is not a weakly prime, because it can be changed into another prime (8513225531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4256612768 + 4256612769.

It is an arithmetic number, because the mean of its divisors is an integer number (4256612769).

Almost surely, 2^8513225537 is an apocalyptic number.

It is an amenable number.

8513225537 is a deficient number, since it is larger than the sum of its proper divisors (1).

8513225537 is an equidigital number, since it uses as much as digits as its factorization.

8513225537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252000, while the sum is 41.

The square root of 8513225537 is about 92267.1422392609. The cubic root of 8513225537 is about 2041.8854746258.

The spelling of 8513225537 in words is "eight billion, five hundred thirteen million, two hundred twenty-five thousand, five hundred thirty-seven".