1533521253 has 16 divisors (see below), whose sum is σ = 2246630400. Its totient is φ = 922717680.

The previous prime is 1533521221. The next prime is 1533521257. The reversal of 1533521253 is 3521253351.

It is not a de Polignac number, because 1533521253 - 2⁵ = 1533521221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1533521253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1533521257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162573 + ... + 171746.

It is an arithmetic number, because the mean of its divisors is an integer number (140414400).

Almost surely, 2^1533521253 is an apocalyptic number.

It is an amenable number.

1533521253 is a deficient number, since it is larger than the sum of its proper divisors (713109147).

1533521253 is a wasteful number, since it uses less digits than its factorization.

1533521253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334472.

The product of its digits is 13500, while the sum is 30.

The square root of 1533521253 is about 39160.1998590406. The cubic root of 1533521253 is about 1153.1786672564.

The spelling of 1533521253 in words is "one billion, five hundred thirty-three million, five hundred twenty-one thousand, two hundred fifty-three".