22001131 has 4 divisors (see below), whose sum is σ = 22092664. Its totient is φ = 21909600.

The previous prime is 22001129. The next prime is 22001137. The reversal of 22001131 is 13110022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13110022 = 2 ⋅6555011.

It is a cyclic number.

It is not a de Polignac number, because 22001131 - 2¹ = 22001129 is a prime.

It is a super-2 number, since 2×22001131² = 968099530558322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22001137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45405 + ... + 45886.

It is an arithmetic number, because the mean of its divisors is an integer number (5523166).

Almost surely, 2^22001131 is an apocalyptic number.

22001131 is a deficient number, since it is larger than the sum of its proper divisors (91533).

22001131 is an equidigital number, since it uses as much as digits as its factorization.

22001131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91532.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 22001131 is about 4690.5363232790. The cubic root of 22001131 is about 280.2087346597.

Adding to 22001131 its reverse (13110022), we get a palindrome (35111153).

The spelling of 22001131 in words is "twenty-two million, one thousand, one hundred thirty-one".