1543212005 has 16 divisors (see below), whose sum is σ = 1887084864. Its totient is φ = 1211232000.

The previous prime is 1543211951. The next prime is 1543212017. The reversal of 1543212005 is 5002123451.

It is not a de Polignac number, because 1543212005 - 2¹⁶ = 1543146469 is a prime.

It is a super-2 number, since 2×1543212005² = 4763006584752240050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74909 + ... + 93261.

It is an arithmetic number, because the mean of its divisors is an integer number (117942804).

Almost surely, 2^1543212005 is an apocalyptic number.

It is an amenable number.

1543212005 is a deficient number, since it is larger than the sum of its proper divisors (343872859).

1543212005 is a wasteful number, since it uses less digits than its factorization.

1543212005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18676.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1543212005 is about 39283.7371567421. The cubic root of 1543212005 is about 1155.6026552017.

Adding to 1543212005 its reverse (5002123451), we get a palindrome (6545335456).

The spelling of 1543212005 in words is "one billion, five hundred forty-three million, two hundred twelve thousand, five".