220138697 has 4 divisors (see below), whose sum is σ = 222196176. Its totient is φ = 218081220.

The previous prime is 220138637. The next prime is 220138753. The reversal of 220138697 is 796831022.

220138697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 220138697 - 2¹² = 220134601 is a prime.

It is a super-2 number, since 2×220138697² = 96922091833715618, 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 220138697.

It is not an unprimeable number, because it can be changed into a prime (220138637) 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, 1028579 + ... + 1028792.

It is an arithmetic number, because the mean of its divisors is an integer number (55549044).

Almost surely, 2^220138697 is an apocalyptic number.

It is an amenable number.

220138697 is a deficient number, since it is larger than the sum of its proper divisors (2057479).

220138697 is a wasteful number, since it uses less digits than its factorization.

220138697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2057478.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 220138697 is about 14837.0717124371. The cubic root of 220138697 is about 603.8079087778.

The spelling of 220138697 in words is "two hundred twenty million, one hundred thirty-eight thousand, six hundred ninety-seven".