21325226 has 8 divisors (see below), whose sum is σ = 34448484. Its totient is φ = 9842400.

The previous prime is 21325219. The next prime is 21325279. The reversal of 21325226 is 62252312.

It can be written as a sum of positive squares in 2 ways, for example, as 21169201 + 156025 = 4601^2 + 395^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 410075 + ... + 410126.

Almost surely, 2^21325226 is an apocalyptic number.

21325226 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21325226 is a deficient number, since it is larger than the sum of its proper divisors (13123258).

21325226 is a wasteful number, since it uses less digits than its factorization.

21325226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820216.

The product of its digits is 1440, while the sum is 23.

The square root of 21325226 is about 4617.9244255401. The cubic root of 21325226 is about 277.3093720952.

Adding to 21325226 its reverse (62252312), we get a palindrome (83577538).

The spelling of 21325226 in words is "twenty-one million, three hundred twenty-five thousand, two hundred twenty-six".