1540725522 has 48 divisors (see below), whose sum is σ = 3597675840. Its totient is φ = 438594912.

The previous prime is 1540725503. The next prime is 1540725539. The reversal of 1540725522 is 2255270451.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 71979 + ... + 90897.

It is an arithmetic number, because the mean of its divisors is an integer number (74951580).

Almost surely, 2^1540725522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1540725522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1798837920).

1540725522 is an abundant number, since it is smaller than the sum of its proper divisors (2056950318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1540725522 is a wasteful number, since it uses less digits than its factorization.

1540725522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19215 (or 19208 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 33.

The square root of 1540725522 is about 39252.0766584394. The cubic root of 1540725522 is about 1154.9816709672.

Adding to 1540725522 its reverse (2255270451), we get a palindrome (3795995973).

The spelling of 1540725522 in words is "one billion, five hundred forty million, seven hundred twenty-five thousand, five hundred twenty-two".