22130261 has 4 divisors (see below), whose sum is σ = 22139712. Its totient is φ = 22120812.

The previous prime is 22130257. The next prime is 22130263. The reversal of 22130261 is 16203122.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22130261 - 2² = 22130257 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 (22130263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1700 + ... + 6866.

It is an arithmetic number, because the mean of its divisors is an integer number (5534928).

Almost surely, 2^22130261 is an apocalyptic number.

It is an amenable number.

22130261 is a deficient number, since it is larger than the sum of its proper divisors (9451).

22130261 is an equidigital number, since it uses as much as digits as its factorization.

22130261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9450.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 22130261 is about 4704.2811353064. The cubic root of 22130261 is about 280.7558700803.

Adding to 22130261 its reverse (16203122), we get a palindrome (38333383).

The spelling of 22130261 in words is "twenty-two million, one hundred thirty thousand, two hundred sixty-one".