2217631982949 has 28 divisors (see below), whose sum is σ = 3432182708352. Its totient is φ = 1430730297000.

The previous prime is 2217631982947. The next prime is 2217631982981. The reversal of 2217631982949 is 9492891367122.

2217631982949 is a `hidden beast` number, since 2 + 21 + 7 + 6 + 319 + 8 + 294 + 9 = 666.

It is not a de Polignac number, because 2217631982949 - 2¹ = 2217631982947 is a prime.

It is a super-2 number, since 2×2217631982949² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2217631982947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 49042227 + ... + 49087424.

Almost surely, 2^{2217631982949} is an apocalyptic number.

It is an amenable number.

2217631982949 is a deficient number, since it is larger than the sum of its proper divisors (1214550725403).

2217631982949 is an frugal number, since it uses more digits than its factorization.

2217631982949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98129700 (or 98129685 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 63.

The spelling of 2217631982949 in words is "two trillion, two hundred seventeen billion, six hundred thirty-one million, nine hundred eighty-two thousand, nine hundred forty-nine".