2213526820 has 24 divisors (see below), whose sum is σ = 4921842744. Its totient is φ = 833327616.

The previous prime is 2213526793. The next prime is 2213526827. The reversal of 2213526820 is 286253122.

It can be written as a sum of positive squares in 4 ways, for example, as 58339044 + 2155187776 = 7638^2 + 46424^2 .

It is not an unprimeable number, because it can be changed into a prime (2213526827) 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, 3254847 + ... + 3255526.

It is an arithmetic number, because the mean of its divisors is an integer number (205076781).

Almost surely, 2^2213526820 is an apocalyptic number.

2213526820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2213526820 is an abundant number, since it is smaller than the sum of its proper divisors (2708315924).

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

2213526820 is a wasteful number, since it uses less digits than its factorization.

2213526820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6510399 (or 6510397 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 2213526820 is about 47048.1330129050. The cubic root of 2213526820 is about 1303.2515880875.

Adding to 2213526820 its reverse (286253122), we get a palindrome (2499779942).

The spelling of 2213526820 in words is "two billion, two hundred thirteen million, five hundred twenty-six thousand, eight hundred twenty".