1543321012 has 12 divisors (see below), whose sum is σ = 2710563940. Its totient is φ = 768874176.

The previous prime is 1543320971. The next prime is 1543321033. The reversal of 1543321012 is 2101233451.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 104939536 + 1438381476 = 10244^2 + 37926^2 .

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, 695337 + ... + 697552.

Almost surely, 2^1543321012 is an apocalyptic number.

It is an amenable number.

1543321012 is a deficient number, since it is larger than the sum of its proper divisors (1167242928).

1543321012 is a wasteful number, since it uses less digits than its factorization.

1543321012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393170 (or 1393168 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1543321012 is about 39285.1245638855. The cubic root of 1543321012 is about 1155.6298637797.

Adding to 1543321012 its reverse (2101233451), we get a palindrome (3644554463).

The spelling of 1543321012 in words is "one billion, five hundred forty-three million, three hundred twenty-one thousand, twelve".