22513554 has 48 divisors (see below), whose sum is σ = 56092608. Its totient is φ = 6392736.

The previous prime is 22513511. The next prime is 22513567. The reversal of 22513554 is 45531522.

It is a happy number.

It is a super-2 number, since 2×22513554² = 1013720227421832, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24369 + ... + 25275.

It is an arithmetic number, because the mean of its divisors is an integer number (1168596).

Almost surely, 2^22513554 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22513554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28046304).

22513554 is an abundant number, since it is smaller than the sum of its proper divisors (33579054).

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

22513554 is a wasteful number, since it uses less digits than its factorization.

22513554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1119 (or 1116 counting only the distinct ones).

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

The square root of 22513554 is about 4744.8449921994. The cubic root of 22513554 is about 282.3674852955.

The spelling of 22513554 in words is "twenty-two million, five hundred thirteen thousand, five hundred fifty-four".