22551534 has 40 divisors (see below), whose sum is σ = 51043608. Its totient is φ = 7441200.

The previous prime is 22551533. The next prime is 22551559. The reversal of 22551534 is 43515522.

It is a happy number.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 22551498 and 22551507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22551533) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16684 + ... + 17984.

Almost surely, 2^22551534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22551534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25521804).

22551534 is an abundant number, since it is smaller than the sum of its proper divisors (28492074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22551534 is a wasteful number, since it uses less digits than its factorization.

22551534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422 (or 1413 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 22551534 is about 4748.8455439191. The cubic root of 22551534 is about 282.5261792117.

The spelling of 22551534 in words is "twenty-two million, five hundred fifty-one thousand, five hundred thirty-four".