2201256520 has 16 divisors (see below), whose sum is σ = 4952827260. Its totient is φ = 880502592.

The previous prime is 2201256487. The next prime is 2201256539. The reversal of 2201256520 is 256521022.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2186310564 + 14945956 = 46758^2 + 3866^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27515667 + ... + 27515746.

Almost surely, 2^2201256520 is an apocalyptic number.

2201256520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2201256520 is an abundant number, since it is smaller than the sum of its proper divisors (2751570740).

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

2201256520 is a wasteful number, since it uses less digits than its factorization.

2201256520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55031424 (or 55031420 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2201256520 is about 46917.5502344272. The cubic root of 2201256520 is about 1300.8390086905.

Adding to 2201256520 its reverse (256521022), we get a palindrome (2457777542).

The spelling of 2201256520 in words is "two billion, two hundred one million, two hundred fifty-six thousand, five hundred twenty".