220015231 has 8 divisors (see below), whose sum is σ = 232001280. Its totient is φ = 208069848.

The previous prime is 220015223. The next prime is 220015249. The reversal of 220015231 is 132510022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 220015231 - 2³ = 220015223 is a prime.

It is a super-2 number, since 2×220015231² = 96813403743966722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220015331) 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 7 ways as a sum of consecutive naturals, for example, 1290 + ... + 21016.

It is an arithmetic number, because the mean of its divisors is an integer number (29000160).

Almost surely, 2^220015231 is an apocalyptic number.

220015231 is a deficient number, since it is larger than the sum of its proper divisors (11986049).

220015231 is a wasteful number, since it uses less digits than its factorization.

220015231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20333.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 220015231 is about 14832.9104022103. The cubic root of 220015231 is about 603.6950046711.

Adding to 220015231 its reverse (132510022), we get a palindrome (352525253).

The spelling of 220015231 in words is "two hundred twenty million, fifteen thousand, two hundred thirty-one".