221950769 has 4 divisors (see below), whose sum is σ = 221984496. Its totient is φ = 221917044.

The previous prime is 221950763. The next prime is 221950801. The reversal of 221950769 is 967059122.

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 a cyclic number.

It is not a de Polignac number, because 221950769 - 2¹⁶ = 221885233 is a prime.

It is a super-2 number, since 2×221950769² = 98524287719382722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221950763) 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, 3419 + ... + 21344.

It is an arithmetic number, because the mean of its divisors is an integer number (55496124).

Almost surely, 2^221950769 is an apocalyptic number.

It is an amenable number.

221950769 is a deficient number, since it is larger than the sum of its proper divisors (33727).

221950769 is an equidigital number, since it uses as much as digits as its factorization.

221950769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33726.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 221950769 is about 14898.0122499614. The cubic root of 221950769 is about 605.4601321657.

The spelling of 221950769 in words is "two hundred twenty-one million, nine hundred fifty thousand, seven hundred sixty-nine".