22121542 has 8 divisors (see below), whose sum is σ = 33256296. Its totient is φ = 11036112.

The previous prime is 22121531. The next prime is 22121543. The reversal of 22121542 is 24512122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11188 + ... + 13015.

It is an arithmetic number, because the mean of its divisors is an integer number (4157037).

Almost surely, 2^22121542 is an apocalyptic number.

22121542 is a deficient number, since it is larger than the sum of its proper divisors (11134754).

22121542 is a wasteful number, since it uses less digits than its factorization.

22121542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24662.

The product of its digits is 320, while the sum is 19.

The square root of 22121542 is about 4703.3543349401. The cubic root of 22121542 is about 280.7189939980.

Adding to 22121542 its reverse (24512122), we get a palindrome (46633664).

The spelling of 22121542 in words is "twenty-two million, one hundred twenty-one thousand, five hundred forty-two".