1533521252 has 6 divisors (see below), whose sum is σ = 2683662198. Its totient is φ = 766760624.

The previous prime is 1533521221. The next prime is 1533521257. The reversal of 1533521252 is 2521253351.

It can be written as a sum of positive squares in only one way, i.e., 797158756 + 736362496 = 28234^2 + 27136^2 .

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 191690153 + ... + 191690160.

It is an arithmetic number, because the mean of its divisors is an integer number (447277033).

Almost surely, 2^1533521252 is an apocalyptic number.

It is an amenable number.

1533521252 is a deficient number, since it is larger than the sum of its proper divisors (1150140946).

1533521252 is a wasteful number, since it uses less digits than its factorization.

1533521252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383380317 (or 383380315 counting only the distinct ones).

The product of its digits is 9000, while the sum is 29.

The square root of 1533521252 is about 39160.1998462725. The cubic root of 1533521252 is about 1153.1786670058.

The spelling of 1533521252 in words is "one billion, five hundred thirty-three million, five hundred twenty-one thousand, two hundred fifty-two".