2217272949 has 12 divisors (see below), whose sum is σ = 3214549312. Its totient is φ = 1472725800.

The previous prime is 2217272929. The next prime is 2217272951. The reversal of 2217272949 is 9492727122.

It is a happy number.

It is not a de Polignac number, because 2217272949 - 2²⁸ = 1948837493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2217272929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 452107 + ... + 456984.

Almost surely, 2^2217272949 is an apocalyptic number.

It is an amenable number.

2217272949 is a deficient number, since it is larger than the sum of its proper divisors (997276363).

2217272949 is a wasteful number, since it uses less digits than its factorization.

2217272949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909368 (or 909365 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 2217272949 is about 47087.9278478040. The cubic root of 2217272949 is about 1303.9863728001.

It can be divided in two parts, 221727 and 2949, that added together give a square (224676 = 474²).

The spelling of 2217272949 in words is "two billion, two hundred seventeen million, two hundred seventy-two thousand, nine hundred forty-nine".