2545243019 has 4 divisors (see below), whose sum is σ = 2776628760. Its totient is φ = 2313857280.

The previous prime is 2545243013. The next prime is 2545243027. The reversal of 2545243019 is 9103425452.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2545243019 is a prime.

It is a super-2 number, since 2×2545243019² = 12956524051536468722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2545243019.

It is not an unprimeable number, because it can be changed into a prime (2545243013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115692854 + ... + 115692875.

It is an arithmetic number, because the mean of its divisors is an integer number (694157190).

Almost surely, 2^2545243019 is an apocalyptic number.

2545243019 is a deficient number, since it is larger than the sum of its proper divisors (231385741).

2545243019 is a wasteful number, since it uses less digits than its factorization.

2545243019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231385740.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 2545243019 is about 50450.4015742194. The cubic root of 2545243019 is about 1365.3471401262.

The spelling of 2545243019 in words is "two billion, five hundred forty-five million, two hundred forty-three thousand, nineteen".