1525223245 has 80 divisors (see below), whose sum is σ = 2385779760. Its totient is φ = 929359872.

The previous prime is 1525223243. The next prime is 1525223267. The reversal of 1525223245 is 5423225251.

It can be written as a sum of positive squares in 8 ways, for example, as 203319081 + 1321904164 = 14259^2 + 36358^2 .

It is not a de Polignac number, because 1525223245 - 2¹ = 1525223243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1525223243) 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 in 79 ways as a sum of consecutive naturals, for example, 4525717 + ... + 4526053.

It is an arithmetic number, because the mean of its divisors is an integer number (29822247).

Almost surely, 2^1525223245 is an apocalyptic number.

It is an amenable number.

1525223245 is a deficient number, since it is larger than the sum of its proper divisors (860556515).

1525223245 is an equidigital number, since it uses as much as digits as its factorization.

1525223245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412 (or 391 counting only the distinct ones).

The product of its digits is 24000, while the sum is 31.

The square root of 1525223245 is about 39054.1066342581. The cubic root of 1525223245 is about 1151.0949231586.

Adding to 1525223245 its reverse (5423225251), we get a palindrome (6948448496).

The spelling of 1525223245 in words is "one billion, five hundred twenty-five million, two hundred twenty-three thousand, two hundred forty-five".