22521151 has 4 divisors (see below), whose sum is σ = 22532904. Its totient is φ = 22509400.

The previous prime is 22521133. The next prime is 22521193. The reversal of 22521151 is 15112522.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22521151 - 2¹¹ = 22519103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22521101) 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, 2260 + ... + 7081.

It is an arithmetic number, because the mean of its divisors is an integer number (5633226).

Almost surely, 2^22521151 is an apocalyptic number.

22521151 is a deficient number, since it is larger than the sum of its proper divisors (11753).

22521151 is an equidigital number, since it uses as much as digits as its factorization.

22521151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11752.

The product of its digits is 200, while the sum is 19.

The square root of 22521151 is about 4745.6454776985. The cubic root of 22521151 is about 282.3992425286.

Adding to 22521151 its reverse (15112522), we get a palindrome (37633673).

It can be divided in two parts, 2252 and 1151, that added together give a triangular number (3403 = T₈₂).

The spelling of 22521151 in words is "twenty-two million, five hundred twenty-one thousand, one hundred fifty-one".