2781172229 has 16 divisors (see below), whose sum is σ = 3192025536. Its totient is φ = 2399990400.

The previous prime is 2781172193. The next prime is 2781172243. The reversal of 2781172229 is 9222711872.

It is a cyclic number.

It is not a de Polignac number, because 2781172229 - 2⁸ = 2781171973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2781172249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66647 + ... + 100020.

It is an arithmetic number, because the mean of its divisors is an integer number (199501596).

Almost surely, 2^2781172229 is an apocalyptic number.

It is an amenable number.

2781172229 is a deficient number, since it is larger than the sum of its proper divisors (410853307).

2781172229 is a wasteful number, since it uses less digits than its factorization.

2781172229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166756.

The product of its digits is 56448, while the sum is 41.

The square root of 2781172229 is about 52736.8204293736. The cubic root of 2781172229 is about 1406.2934739640.

The spelling of 2781172229 in words is "two billion, seven hundred eighty-one million, one hundred seventy-two thousand, two hundred twenty-nine".