22051801 has 4 divisors (see below), whose sum is σ = 22150912. Its totient is φ = 21952692.

The previous prime is 22051793. The next prime is 22051807. The reversal of 22051801 is 10815022.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10815022 = 2 ⋅5407511.

It is a cyclic number.

It is not a de Polignac number, because 22051801 - 2³ = 22051793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22051807) 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, 49221 + ... + 49666.

It is an arithmetic number, because the mean of its divisors is an integer number (5537728).

Almost surely, 2^22051801 is an apocalyptic number.

It is an amenable number.

22051801 is a deficient number, since it is larger than the sum of its proper divisors (99111).

22051801 is an equidigital number, since it uses as much as digits as its factorization.

22051801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99110.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 22051801 is about 4695.9345182828. The cubic root of 22051801 is about 280.4236825601.

Adding to 22051801 its reverse (10815022), we get a palindrome (32866823).

The spelling of 22051801 in words is "twenty-two million, fifty-one thousand, eight hundred one".