1523120225 has 24 divisors (see below), whose sum is σ = 2080408512. Its totient is φ = 1096948800.

The previous prime is 1523120197. The next prime is 1523120227. The reversal of 1523120225 is 5220213251.

It is a de Polignac number, because none of the positive numbers 2^k-1523120225 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1523120225.

It is not an unprimeable number, because it can be changed into a prime (1523120227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1439 + ... + 55211.

It is an arithmetic number, because the mean of its divisors is an integer number (86683688).

Almost surely, 2^1523120225 is an apocalyptic number.

It is an amenable number.

1523120225 is a deficient number, since it is larger than the sum of its proper divisors (557288287).

1523120225 is a wasteful number, since it uses less digits than its factorization.

1523120225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53897 (or 53892 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1523120225 is about 39027.1729055539. The cubic root of 1523120225 is about 1150.5656259738.

Adding to 1523120225 its reverse (5220213251), we get a palindrome (6743333476).

The spelling of 1523120225 in words is "one billion, five hundred twenty-three million, one hundred twenty thousand, two hundred twenty-five".