2216625749 has 4 divisors (see below), whose sum is σ = 2387135436. Its totient is φ = 2046116064.

The previous prime is 2216625727. The next prime is 2216625757. The reversal of 2216625749 is 9475266122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 671742724 + 1544883025 = 25918^2 + 39305^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2216625749 is a prime.

It is a super-2 number, since 2×2216625749² = 9826859422259622002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2216625769) 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 3 ways as a sum of consecutive naturals, for example, 85254824 + ... + 85254849.

It is an arithmetic number, because the mean of its divisors is an integer number (596783859).

Almost surely, 2^2216625749 is an apocalyptic number.

It is an amenable number.

2216625749 is a deficient number, since it is larger than the sum of its proper divisors (170509687).

2216625749 is a wasteful number, since it uses less digits than its factorization.

2216625749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170509686.

The product of its digits is 362880, while the sum is 44.

The square root of 2216625749 is about 47081.0550965035. The cubic root of 2216625749 is about 1303.8594868872.

The spelling of 2216625749 in words is "two billion, two hundred sixteen million, six hundred twenty-five thousand, seven hundred forty-nine".