22002231 has 4 divisors (see below), whose sum is σ = 29336312. Its totient is φ = 14668152.

The previous prime is 22002217. The next prime is 22002257. The reversal of 22002231 is 13220022.

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

It is not a de Polignac number, because 22002231 - 2¹⁰ = 22001207 is a prime.

It is a super-2 number, since 2×22002231² = 968196337954722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22002031) 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, 3667036 + ... + 3667041.

It is an arithmetic number, because the mean of its divisors is an integer number (7334078).

Almost surely, 2^22002231 is an apocalyptic number.

22002231 is a deficient number, since it is larger than the sum of its proper divisors (7334081).

22002231 is an equidigital number, since it uses as much as digits as its factorization.

22002231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7334080.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 22002231 is about 4690.6535791934. The cubic root of 22002231 is about 280.2134044874.

Adding to 22002231 its reverse (13220022), we get a palindrome (35222253).

The spelling of 22002231 in words is "twenty-two million, two thousand, two hundred thirty-one".