2778331215 has 48 divisors (see below), whose sum is σ = 4894331904. Its totient is φ = 1344826560.

The previous prime is 2778331201. The next prime is 2778331219. The reversal of 2778331215 is 5121338772.

It is not a de Polignac number, because 2778331215 - 2⁸ = 2778330959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778331219) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1754314 + ... + 1755896.

It is an arithmetic number, because the mean of its divisors is an integer number (101965248).

Almost surely, 2^2778331215 is an apocalyptic number.

2778331215 is a deficient number, since it is larger than the sum of its proper divisors (2116000689).

2778331215 is a wasteful number, since it uses less digits than its factorization.

2778331215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2580 (or 2569 counting only the distinct ones).

The product of its digits is 70560, while the sum is 39.

The square root of 2778331215 is about 52709.8777744741. The cubic root of 2778331215 is about 1405.8144600431.

Adding to 2778331215 its reverse (5121338772), we get a palindrome (7899669987).

The spelling of 2778331215 in words is "two billion, seven hundred seventy-eight million, three hundred thirty-one thousand, two hundred fifteen".