22145534 has 4 divisors (see below), whose sum is σ = 33218304. Its totient is φ = 11072766.

The previous prime is 22145533. The next prime is 22145537. The reversal of 22145534 is 43554122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×22145534² = 980849352290312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22145533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5536382 + ... + 5536385.

It is an arithmetic number, because the mean of its divisors is an integer number (8304576).

Almost surely, 2^22145534 is an apocalyptic number.

22145534 is a deficient number, since it is larger than the sum of its proper divisors (11072770).

22145534 is a wasteful number, since it uses less digits than its factorization.

22145534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11072769.

The product of its digits is 4800, while the sum is 26.

The square root of 22145534 is about 4705.9041639200. The cubic root of 22145534 is about 280.8204422717.

Adding to 22145534 its reverse (43554122), we get a palindrome (65699656).

The spelling of 22145534 in words is "twenty-two million, one hundred forty-five thousand, five hundred thirty-four".