21225030167 has 16 divisors (see below), whose sum is σ = 23317147392. Its totient is φ = 19160219520.

The previous prime is 21225030143. The next prime is 21225030181. The reversal of 21225030167 is 76103052212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21225030167 - 2²⁶ = 21157921303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21225030367) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2320958 + ... + 2330084.

It is an arithmetic number, because the mean of its divisors is an integer number (1457321712).

Almost surely, 2^21225030167 is an apocalyptic number.

21225030167 is a deficient number, since it is larger than the sum of its proper divisors (2092117225).

21225030167 is a wasteful number, since it uses less digits than its factorization.

21225030167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10598.

The product of its (nonzero) digits is 5040, while the sum is 29.

Adding to 21225030167 its reverse (76103052212), we get a palindrome (97328082379).

The spelling of 21225030167 in words is "twenty-one billion, two hundred twenty-five million, thirty thousand, one hundred sixty-seven".