825215497 has 2 divisors, whose sum is σ = 825215498. Its totient is φ = 825215496.

The previous prime is 825215473. The next prime is 825215659. The reversal of 825215497 is 794512528.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 824608656 + 606841 = 28716^2 + 779^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-825215497 is a prime.

It is not a weakly prime, because it can be changed into another prime (825215407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412607748 + 412607749.

It is an arithmetic number, because the mean of its divisors is an integer number (412607749).

Almost surely, 2^825215497 is an apocalyptic number.

It is an amenable number.

825215497 is a deficient number, since it is larger than the sum of its proper divisors (1).

825215497 is an equidigital number, since it uses as much as digits as its factorization.

825215497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 201600, while the sum is 43.

The square root of 825215497 is about 28726.5643090154. The cubic root of 825215497 is about 937.9703820721.

The spelling of 825215497 in words is "eight hundred twenty-five million, two hundred fifteen thousand, four hundred ninety-seven".