2781420015 has 128 divisors (see below), whose sum is σ = 5308416000. Its totient is φ = 1229437440.

The previous prime is 2781420011. The next prime is 2781420017. The reversal of 2781420015 is 5100241872.

It is not a de Polignac number, because 2781420015 - 2² = 2781420011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2781420011) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 13976886 + ... + 13977084.

It is an arithmetic number, because the mean of its divisors is an integer number (41472000).

Almost surely, 2^2781420015 is an apocalyptic number.

2781420015 is a deficient number, since it is larger than the sum of its proper divisors (2526995985).

2781420015 is a wasteful number, since it uses less digits than its factorization.

2781420015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397.

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 2781420015 is about 52739.1696464781. The cubic root of 2781420015 is about 1406.3352368680.

Adding to 2781420015 its reverse (5100241872), we get a palindrome (7881661887).

The spelling of 2781420015 in words is "two billion, seven hundred eighty-one million, four hundred twenty thousand, fifteen".