220139813 has 4 divisors (see below), whose sum is σ = 221490528. Its totient is φ = 218789100.

The previous prime is 220139807. The next prime is 220139839. The reversal of 220139813 is 318931022.

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 220139813 - 2²⁶ = 153030949 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 (220139863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 675113 + ... + 675438.

It is an arithmetic number, because the mean of its divisors is an integer number (55372632).

Almost surely, 2^220139813 is an apocalyptic number.

It is an amenable number.

220139813 is a deficient number, since it is larger than the sum of its proper divisors (1350715).

220139813 is a wasteful number, since it uses less digits than its factorization.

220139813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350714.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 220139813 is about 14837.1093208886. The cubic root of 220139813 is about 603.8089291171.

The spelling of 220139813 in words is "two hundred twenty million, one hundred thirty-nine thousand, eight hundred thirteen".