222920913 has 4 divisors (see below), whose sum is σ = 297227888. Its totient is φ = 148613940.

The previous prime is 222920909. The next prime is 222920921. The reversal of 222920913 is 319029222.

It is a happy number.

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.

It is not a de Polignac number, because 222920913 - 2² = 222920909 is a prime.

It is a super-3 number, since 3×222920913³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (222920923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37153483 + ... + 37153488.

It is an arithmetic number, because the mean of its divisors is an integer number (74306972).

Almost surely, 2^222920913 is an apocalyptic number.

It is an amenable number.

222920913 is a deficient number, since it is larger than the sum of its proper divisors (74306975).

222920913 is an equidigital number, since it uses as much as digits as its factorization.

222920913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74306974.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 222920913 is about 14930.5362596258. The cubic root of 222920913 is about 606.3410028410.

It can be divided in two parts, 2229209 and 13, that added together give a palindrome (2229222).

The spelling of 222920913 in words is "two hundred twenty-two million, nine hundred twenty thousand, nine hundred thirteen".