221226526 has 16 divisors (see below), whose sum is σ = 335200320. Its totient is φ = 109499040.

The previous prime is 221226521. The next prime is 221226539. The reversal of 221226526 is 625622122.

It is a junction number, because it is equal to n+sod(n) for n = 221226494 and 221226503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221226521) 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, 85240 + ... + 87796.

It is an arithmetic number, because the mean of its divisors is an integer number (20950020).

Almost surely, 2^221226526 is an apocalyptic number.

221226526 is a deficient number, since it is larger than the sum of its proper divisors (113973794).

221226526 is a wasteful number, since it uses less digits than its factorization.

221226526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2979.

The product of its digits is 5760, while the sum is 28.

The square root of 221226526 is about 14873.6856898349. The cubic root of 221226526 is about 604.8008597142.

Adding to 221226526 its reverse (625622122), we get a palindrome (846848648).

The spelling of 221226526 in words is "two hundred twenty-one million, two hundred twenty-six thousand, five hundred twenty-six".