2581372245 has 16 divisors (see below), whose sum is σ = 4172777280. Its totient is φ = 1362537984.

The previous prime is 2581372231. The next prime is 2581372291. The reversal of 2581372245 is 5422731852.

It is not a de Polignac number, because 2581372245 - 2⁹ = 2581371733 is a prime.

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, 885615 + ... + 888524.

It is an arithmetic number, because the mean of its divisors is an integer number (260798580).

Almost surely, 2^2581372245 is an apocalyptic number.

It is an amenable number.

2581372245 is a deficient number, since it is larger than the sum of its proper divisors (1591405035).

2581372245 is a wasteful number, since it uses less digits than its factorization.

2581372245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1774244.

The product of its digits is 134400, while the sum is 39.

The square root of 2581372245 is about 50807.2066246512. The cubic root of 2581372245 is about 1371.7770898484. Note that the first 3 decimals are identical.

The spelling of 2581372245 in words is "two billion, five hundred eighty-one million, three hundred seventy-two thousand, two hundred forty-five".