2217920623 has 4 divisors (see below), whose sum is σ = 2348386560. Its totient is φ = 2087454688.

The previous prime is 2217920611. The next prime is 2217920641. The reversal of 2217920623 is 3260297122.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2217920623 - 2¹⁷ = 2217789551 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 (2217920603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65232943 + ... + 65232976.

It is an arithmetic number, because the mean of its divisors is an integer number (587096640).

Almost surely, 2^2217920623 is an apocalyptic number.

2217920623 is a deficient number, since it is larger than the sum of its proper divisors (130465937).

2217920623 is a wasteful number, since it uses less digits than its factorization.

2217920623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130465936.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 2217920623 is about 47094.8046285363. The cubic root of 2217920623 is about 1304.1133269264.

The spelling of 2217920623 in words is "two billion, two hundred seventeen million, nine hundred twenty thousand, six hundred twenty-three".