1533221794 has 16 divisors (see below), whose sum is σ = 2488489920. Its totient is φ = 704284560.

The previous prime is 1533221759. The next prime is 1533221801. The reversal of 1533221794 is 4971223351.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134254 + ... + 145225.

It is an arithmetic number, because the mean of its divisors is an integer number (155530620).

Almost surely, 2^1533221794 is an apocalyptic number.

1533221794 is a deficient number, since it is larger than the sum of its proper divisors (955268126).

1533221794 is a wasteful number, since it uses less digits than its factorization.

1533221794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279705.

The product of its digits is 45360, while the sum is 37.

The square root of 1533221794 is about 39156.3761602118. The cubic root of 1533221794 is about 1153.1035998888.

The spelling of 1533221794 in words is "one billion, five hundred thirty-three million, two hundred twenty-one thousand, seven hundred ninety-four".