2205152781 has 16 divisors (see below), whose sum is σ = 3167269056. Its totient is φ = 1356633216.

The previous prime is 2205152759. The next prime is 2205152797. The reversal of 2205152781 is 1872515022.

It is not a de Polignac number, because 2205152781 - 2²¹ = 2203055629 is a prime.

It is a super-2 number, since 2×2205152781² = 9725397575104067922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2205152581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200286 + ... + 211008.

It is an arithmetic number, because the mean of its divisors is an integer number (197954316).

Almost surely, 2^2205152781 is an apocalyptic number.

It is an amenable number.

2205152781 is a deficient number, since it is larger than the sum of its proper divisors (962116275).

2205152781 is a wasteful number, since it uses less digits than its factorization.

2205152781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16012.

The product of its (nonzero) digits is 11200, while the sum is 33.

The square root of 2205152781 is about 46959.0543026582. The cubic root of 2205152781 is about 1301.6060586002.

The spelling of 2205152781 in words is "two billion, two hundred five million, one hundred fifty-two thousand, seven hundred eighty-one".