245183221 has 4 divisors (see below), whose sum is σ = 246651552. Its totient is φ = 243714892.

The previous prime is 245183209. The next prime is 245183233. The reversal of 245183221 is 122381542.

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 an interprime number because it is at equal distance from previous prime (245183209) and next prime (245183233).

It is a cyclic number.

It is not a de Polignac number, because 245183221 - 2⁵ = 245183189 is a prime.

It is a super-2 number, since 2×245183221² = 120229623719869682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 245183221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245183251) 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, 733915 + ... + 734248.

It is an arithmetic number, because the mean of its divisors is an integer number (61662888).

Almost surely, 2^245183221 is an apocalyptic number.

It is an amenable number.

245183221 is a deficient number, since it is larger than the sum of its proper divisors (1468331).

245183221 is a wasteful number, since it uses less digits than its factorization.

245183221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1468330.

The product of its digits is 3840, while the sum is 28.

The square root of 245183221 is about 15658.3275288263. The cubic root of 245183221 is about 625.8884184618. Note that the first 3 decimals are identical.

The spelling of 245183221 in words is "two hundred forty-five million, one hundred eighty-three thousand, two hundred twenty-one".