2781251875 has 10 divisors (see below), whose sum is σ = 3475453124. Its totient is φ = 2225001000.

The previous prime is 2781251861. The next prime is 2781251887. The reversal of 2781251875 is 5781521872.

It is not a de Polignac number, because 2781251875 - 2²¹ = 2779154723 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2224377 + ... + 2225626.

Almost surely, 2^2781251875 is an apocalyptic number.

2781251875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2781251875 is a deficient number, since it is larger than the sum of its proper divisors (694201249).

2781251875 is an frugal number, since it uses more digits than its factorization.

2781251875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4450023 (or 4450008 counting only the distinct ones).

The product of its digits is 313600, while the sum is 46.

The square root of 2781251875 is about 52737.5755510243. The cubic root of 2781251875 is about 1406.3068981093.

It can be divided in two parts, 278 and 1251875, that added together give a triangular number (1252153 = T₁₅₈₂).

The spelling of 2781251875 in words is "two billion, seven hundred eighty-one million, two hundred fifty-one thousand, eight hundred seventy-five".