201220439 has 4 divisors (see below), whose sum is σ = 229966224. Its totient is φ = 172474656.

The previous prime is 201220429. The next prime is 201220457. The reversal of 201220439 is 934022102.

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

It is a cyclic number.

It is not a de Polignac number, because 201220439 - 2⁴ = 201220423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201220429) 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, 14372882 + ... + 14372895.

It is an arithmetic number, because the mean of its divisors is an integer number (57491556).

Almost surely, 2^201220439 is an apocalyptic number.

201220439 is a deficient number, since it is larger than the sum of its proper divisors (28745785).

201220439 is an equidigital number, since it uses as much as digits as its factorization.

201220439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28745784.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 201220439 is about 14185.2190325000. The cubic root of 201220439 is about 585.9906646620.

The spelling of 201220439 in words is "two hundred one million, two hundred twenty thousand, four hundred thirty-nine".