22554402 has 64 divisors (see below), whose sum is σ = 51408000. Its totient is φ = 6586944.

The previous prime is 22554397. The next prime is 22554409. The reversal of 22554402 is 20445522.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22554409) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 382249 + ... + 382307.

It is an arithmetic number, because the mean of its divisors is an integer number (803250).

Almost surely, 2^22554402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22554402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25704000).

22554402 is an abundant number, since it is smaller than the sum of its proper divisors (28853598).

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

22554402 is a wasteful number, since it uses less digits than its factorization.

22554402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 22554402 is about 4749.1475024471. The cubic root of 22554402 is about 282.5381554958.

Adding to 22554402 its reverse (20445522), we get a palindrome (42999924).

The spelling of 22554402 in words is "twenty-two million, five hundred fifty-four thousand, four hundred two".