10526221 has 4 divisors (see below), whose sum is σ = 10698844. Its totient is φ = 10353600.

The previous prime is 10526183. The next prime is 10526251. The reversal of 10526221 is 12262501.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2340900 + 8185321 = 1530^2 + 2861^2 .

It is a cyclic number.

It is not a de Polignac number, because 10526221 - 2¹³ = 10518029 is a prime.

It is a super-2 number, since 2×10526221² = 221602657081682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10526251) 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, 86220 + ... + 86341.

It is an arithmetic number, because the mean of its divisors is an integer number (2674711).

Almost surely, 2^10526221 is an apocalyptic number.

It is an amenable number.

10526221 is a deficient number, since it is larger than the sum of its proper divisors (172623).

10526221 is an equidigital number, since it uses as much as digits as its factorization.

10526221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172622.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 10526221 is about 3244.4138145434. The cubic root of 10526221 is about 219.1580838410.

Adding to 10526221 its reverse (12262501), we get a palindrome (22788722).

The spelling of 10526221 in words is "ten million, five hundred twenty-six thousand, two hundred twenty-one".