22153261 has 16 divisors (see below), whose sum is σ = 25704000. Its totient is φ = 18908928.

The previous prime is 22153253. The next prime is 22153267. The reversal of 22153261 is 16235122.

It is a cyclic number.

It is not a de Polignac number, because 22153261 - 2³ = 22153253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22153267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12190 + ... + 13888.

It is an arithmetic number, because the mean of its divisors is an integer number (1606500).

Almost surely, 2^22153261 is an apocalyptic number.

It is an amenable number.

22153261 is a deficient number, since it is larger than the sum of its proper divisors (3550739).

22153261 is a wasteful number, since it uses less digits than its factorization.

22153261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1788.

The product of its digits is 720, while the sum is 22.

The square root of 22153261 is about 4706.7250822626. The cubic root of 22153261 is about 280.8530996799.

Adding to 22153261 its reverse (16235122), we get a palindrome (38388383).

It can be divided in two parts, 2215 and 3261, that added together give a square (5476 = 74²).

The spelling of 22153261 in words is "twenty-two million, one hundred fifty-three thousand, two hundred sixty-one".