21225007262 has 16 divisors (see below), whose sum is σ = 32454067200. Its totient is φ = 10408764600.

The previous prime is 21225007261. The next prime is 21225007277. The reversal of 21225007262 is 26270052212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21225007261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 420962 + ... + 468677.

It is an arithmetic number, because the mean of its divisors is an integer number (2028379200).

Almost surely, 2^21225007262 is an apocalyptic number.

21225007262 is a deficient number, since it is larger than the sum of its proper divisors (11229059938).

21225007262 is a wasteful number, since it uses less digits than its factorization.

21225007262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889871.

The product of its (nonzero) digits is 6720, while the sum is 29.

Adding to 21225007262 its reverse (26270052212), we get a palindrome (47495059474).

The spelling of 21225007262 in words is "twenty-one billion, two hundred twenty-five million, seven thousand, two hundred sixty-two".