2217405920 has 48 divisors (see below), whose sum is σ = 5242064688. Its totient is φ = 886379520.

The previous prime is 2217405907. The next prime is 2217405943. The reversal of 2217405920 is 295047122.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 305372 + ... + 312548.

It is an arithmetic number, because the mean of its divisors is an integer number (109209681).

Almost surely, 2^2217405920 is an apocalyptic number.

2217405920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2217405920 is an abundant number, since it is smaller than the sum of its proper divisors (3024658768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2217405920 is a wasteful number, since it uses less digits than its factorization.

2217405920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9123 (or 9115 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 2217405920 is about 47089.3397702707. The cubic root of 2217405920 is about 1304.0124391903.

The spelling of 2217405920 in words is "two billion, two hundred seventeen million, four hundred five thousand, nine hundred twenty".