1533221012 has 12 divisors (see below), whose sum is σ = 2683702560. Its totient is φ = 766448856.

The previous prime is 1533221003. The next prime is 1533221021. The reversal of 1533221012 is 2101223351.

It is an interprime number because it is at equal distance from previous prime (1533221003) and next prime (1533221021).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17648 + ... + 58119.

It is an arithmetic number, because the mean of its divisors is an integer number (223641880).

Almost surely, 2^1533221012 is an apocalyptic number.

It is an amenable number.

1533221012 is a deficient number, since it is larger than the sum of its proper divisors (1150481548).

1533221012 is a wasteful number, since it uses less digits than its factorization.

1533221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80830 (or 80828 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1533221012 is about 39156.3661746082. The cubic root of 1533221012 is about 1153.1034038469.

Adding to 1533221012 its reverse (2101223351), we get a palindrome (3634444363).

The spelling of 1533221012 in words is "one billion, five hundred thirty-three million, two hundred twenty-one thousand, twelve".