22251015 has 24 divisors (see below), whose sum is σ = 38678640. Its totient is φ = 11833344.

The previous prime is 22251013. The next prime is 22251017. The reversal of 22251015 is 51015222.

It is an interprime number because it is at equal distance from previous prime (22251013) and next prime (22251017).

It is not a de Polignac number, because 22251015 - 2¹ = 22251013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22251013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28551 + ... + 29319.

It is an arithmetic number, because the mean of its divisors is an integer number (1611610).

Almost surely, 2^22251015 is an apocalyptic number.

22251015 is a deficient number, since it is larger than the sum of its proper divisors (16427625).

22251015 is a wasteful number, since it uses less digits than its factorization.

22251015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423 (or 1420 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 22251015 is about 4717.0981545861. The cubic root of 22251015 is about 281.2655932095.

Adding to 22251015 its reverse (51015222), we get a palindrome (73266237).

It can be divided in two parts, 2225 and 1015, that added together give a triangular number (3240 = T₈₀).

The spelling of 22251015 in words is "twenty-two million, two hundred fifty-one thousand, fifteen".