2543145405 has 8 divisors (see below), whose sum is σ = 4069032672. Its totient is φ = 1356344208.

The previous prime is 2543145391. The next prime is 2543145427. The reversal of 2543145405 is 5045413452.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2543145405 - 2⁴ = 2543145389 is a prime.

It is a super-2 number, since 2×2543145405² = 12935177101945228050, which contains 22 as substring.

It is a congruent number.

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, 84771499 + ... + 84771528.

It is an arithmetic number, because the mean of its divisors is an integer number (508629084).

Almost surely, 2^2543145405 is an apocalyptic number.

It is an amenable number.

2543145405 is a deficient number, since it is larger than the sum of its proper divisors (1525887267).

2543145405 is a wasteful number, since it uses less digits than its factorization.

2543145405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169543035.

The product of its (nonzero) digits is 48000, while the sum is 33.

The square root of 2543145405 is about 50429.6084160883. The cubic root of 2543145405 is about 1364.9719620158.

Adding to 2543145405 its reverse (5045413452), we get a palindrome (7588558857).

The spelling of 2543145405 in words is "two billion, five hundred forty-three million, one hundred forty-five thousand, four hundred five".