2781213508 has 12 divisors (see below), whose sum is σ = 4949617680. Its totient is φ = 1367037032.

The previous prime is 2781213499. The next prime is 2781213509. The reversal of 2781213508 is 8053121872.

2781213508 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2781213509) 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, 5892166 + ... + 5892637.

It is an arithmetic number, because the mean of its divisors is an integer number (412468140).

Almost surely, 2^2781213508 is an apocalyptic number.

It is an amenable number.

2781213508 is a deficient number, since it is larger than the sum of its proper divisors (2168404172).

2781213508 is a wasteful number, since it uses less digits than its factorization.

2781213508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11784866 (or 11784864 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 2781213508 is about 52737.2117958468. The cubic root of 2781213508 is about 1406.3004314740.

The spelling of 2781213508 in words is "two billion, seven hundred eighty-one million, two hundred thirteen thousand, five hundred eight".