1543216473 has 6 divisors (see below), whose sum is σ = 2229090474. Its totient is φ = 1028810976.

The previous prime is 1543216457. The next prime is 1543216481. The reversal of 1543216473 is 3746123451.

1543216473 is a `hidden beast` number, since 1 + 5 + 4 + 3 + 2 + 1 + 647 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 801852489 + 741363984 = 28317^2 + 27228^2 .

It is not a de Polignac number, because 1543216473 - 2⁴ = 1543216457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1543216273) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 85734240 + ... + 85734257.

It is an arithmetic number, because the mean of its divisors is an integer number (371515079).

Almost surely, 2^1543216473 is an apocalyptic number.

It is an amenable number.

1543216473 is a deficient number, since it is larger than the sum of its proper divisors (685874001).

1543216473 is a wasteful number, since it uses less digits than its factorization.

1543216473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171468503 (or 171468500 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 1543216473 is about 39283.7940250175. The cubic root of 1543216473 is about 1155.6037704573.

The spelling of 1543216473 in words is "one billion, five hundred forty-three million, two hundred sixteen thousand, four hundred seventy-three".