22042541 has 8 divisors (see below), whose sum is σ = 22715640. Its totient is φ = 21379072.

The previous prime is 22042511. The next prime is 22042547. The reversal of 22042541 is 14524022.

22042541 = 453² + 454² + ... + 541².

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7678441 + 14364100 = 2771^2 + 3790^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 22042541 - 2⁶ = 22042477 is a prime.

It is a super-2 number, since 2×22042541² = 971747227473362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22042547) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2381 + ... + 7053.

It is an arithmetic number, because the mean of its divisors is an integer number (2839455).

Almost surely, 2^22042541 is an apocalyptic number.

It is an amenable number.

22042541 is a deficient number, since it is larger than the sum of its proper divisors (673099).

22042541 is an equidigital number, since it uses as much as digits as its factorization.

22042541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4815.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 22042541 is about 4694.9484555211. The cubic root of 22042541 is about 280.3844251943.

Adding to 22042541 its reverse (14524022), we get a palindrome (36566563).

The spelling of 22042541 in words is "twenty-two million, forty-two thousand, five hundred forty-one".