22151541 has 4 divisors (see below), whose sum is σ = 29535392. Its totient is φ = 14767692.

The previous prime is 22151539. The next prime is 22151551. The reversal of 22151541 is 14515122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 22151541 - 2¹ = 22151539 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22151551) 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, 3691921 + ... + 3691926.

It is an arithmetic number, because the mean of its divisors is an integer number (7383848).

Almost surely, 2^22151541 is an apocalyptic number.

It is an amenable number.

22151541 is a deficient number, since it is larger than the sum of its proper divisors (7383851).

22151541 is an equidigital number, since it uses as much as digits as its factorization.

22151541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7383850.

The product of its digits is 400, while the sum is 21.

The square root of 22151541 is about 4706.5423614369. The cubic root of 22151541 is about 280.8458309256.

Adding to 22151541 its reverse (14515122), we get a palindrome (36666663).

The spelling of 22151541 in words is "twenty-two million, one hundred fifty-one thousand, five hundred forty-one".