1525223243 has 2 divisors, whose sum is σ = 1525223244. Its totient is φ = 1525223242.

The previous prime is 1525223197. The next prime is 1525223267. The reversal of 1525223243 is 3423225251.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1525223243 - 2²⁰ = 1524174667 is a prime.

It is not a weakly prime, because it can be changed into another prime (1525223143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 762611621 + 762611622.

It is an arithmetic number, because the mean of its divisors is an integer number (762611622).

Almost surely, 2^1525223243 is an apocalyptic number.

1525223243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1525223243 is an equidigital number, since it uses as much as digits as its factorization.

1525223243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 29.

The square root of 1525223243 is about 39054.1066086526. The cubic root of 1525223243 is about 1151.0949226554.

Adding to 1525223243 its reverse (3423225251), we get a palindrome (4948448494).

The spelling of 1525223243 in words is "one billion, five hundred twenty-five million, two hundred twenty-three thousand, two hundred forty-three".