22154534 has 4 divisors (see below), whose sum is σ = 33231804. Its totient is φ = 11077266.

The previous prime is 22154533. The next prime is 22154549. The reversal of 22154534 is 43545122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43545122 = 2 ⋅21772561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22154533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5538632 + ... + 5538635.

It is an arithmetic number, because the mean of its divisors is an integer number (8307951).

Almost surely, 2^22154534 is an apocalyptic number.

22154534 is a deficient number, since it is larger than the sum of its proper divisors (11077270).

22154534 is a wasteful number, since it uses less digits than its factorization.

22154534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11077269.

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

The square root of 22154534 is about 4706.8603123526. The cubic root of 22154534 is about 280.8584791610.

Adding to 22154534 its reverse (43545122), we get a palindrome (65699656).

The spelling of 22154534 in words is "twenty-two million, one hundred fifty-four thousand, five hundred thirty-four".