2217542020 has 24 divisors (see below), whose sum is σ = 4657958424. Its totient is φ = 886803456.

The previous prime is 2217542009. The next prime is 2217542021. The reversal of 2217542020 is 202457122.

It can be written as a sum of positive squares in 4 ways, for example, as 211935364 + 2005606656 = 14558^2 + 44784^2 .

It is a super-2 number, since 2×2217542020² = 9834985220931360800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2217542021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92302 + ... + 113818.

It is an arithmetic number, because the mean of its divisors is an integer number (194081601).

Almost surely, 2^2217542020 is an apocalyptic number.

2217542020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2217542020 is an abundant number, since it is smaller than the sum of its proper divisors (2440416404).

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

2217542020 is a wasteful number, since it uses less digits than its factorization.

2217542020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26679 (or 26677 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 2217542020 is about 47090.7848734760. The cubic root of 2217542020 is about 1304.0391178813.

Adding to 2217542020 its reverse (202457122), we get a palindrome (2419999142).

The spelling of 2217542020 in words is "two billion, two hundred seventeen million, five hundred forty-two thousand, twenty".