22145401 has 4 divisors (see below), whose sum is σ = 22341492. Its totient is φ = 21949312.

The previous prime is 22145363. The next prime is 22145411. The reversal of 22145401 is 10454122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3861225 + 18284176 = 1965^2 + 4276^2 .

It is a cyclic number.

It is not a de Polignac number, because 22145401 - 2¹⁹ = 21621113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22145411) 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, 97876 + ... + 98101.

It is an arithmetic number, because the mean of its divisors is an integer number (5585373).

Almost surely, 2^22145401 is an apocalyptic number.

It is an amenable number.

22145401 is a deficient number, since it is larger than the sum of its proper divisors (196091).

22145401 is a wasteful number, since it uses less digits than its factorization.

22145401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196090.

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

The square root of 22145401 is about 4705.8900327143. The cubic root of 22145401 is about 280.8198800937.

Adding to 22145401 its reverse (10454122), we get a palindrome (32599523).

The spelling of 22145401 in words is "twenty-two million, one hundred forty-five thousand, four hundred one".