222621481 has 4 divisors (see below), whose sum is σ = 223577172. Its totient is φ = 221665792.

The previous prime is 222621463. The next prime is 222621517. The reversal of 222621481 is 184126222.

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

It can be written as a sum of positive squares in 2 ways, for example, as 93026025 + 129595456 = 9645^2 + 11384^2 .

It is a cyclic number.

It is not a de Polignac number, because 222621481 - 2⁷ = 222621353 is a prime.

It is a super-2 number, since 2×222621481² = 99120647605266722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222621181) 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, 477496 + ... + 477961.

It is an arithmetic number, because the mean of its divisors is an integer number (55894293).

Almost surely, 2^222621481 is an apocalyptic number.

It is an amenable number.

222621481 is a deficient number, since it is larger than the sum of its proper divisors (955691).

222621481 is an equidigital number, since it uses as much as digits as its factorization.

222621481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955690.

The product of its digits is 3072, while the sum is 28.

The square root of 222621481 is about 14920.5053868828. The cubic root of 222621481 is about 606.0693979204.

It can be divided in two parts, 222621 and 481, that multiplied together give a palindrome (107080701).

The spelling of 222621481 in words is "two hundred twenty-two million, six hundred twenty-one thousand, four hundred eighty-one".