22051873 has 4 divisors (see below), whose sum is σ = 23349060. Its totient is φ = 20754688.

The previous prime is 22051859. The next prime is 22051879. The reversal of 22051873 is 37815022.

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 16064064 + 5987809 = 4008^2 + 2447^2 .

It is a de Polignac number, because none of the positive numbers 2^k-22051873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22051879) 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, 648568 + ... + 648601.

It is an arithmetic number, because the mean of its divisors is an integer number (5837265).

Almost surely, 2^22051873 is an apocalyptic number.

It is an amenable number.

22051873 is a deficient number, since it is larger than the sum of its proper divisors (1297187).

22051873 is a wasteful number, since it uses less digits than its factorization.

22051873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297186.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 22051873 is about 4695.9421844823. The cubic root of 22051873 is about 280.4239877579.

Adding to 22051873 its reverse (37815022), we get a palindrome (59866895).

The spelling of 22051873 in words is "twenty-two million, fifty-one thousand, eight hundred seventy-three".