220135531 has 8 divisors (see below), whose sum is σ = 274454784. Its totient is φ = 171534120.

The previous prime is 220135523. The next prime is 220135541. The reversal of 220135531 is 135531022.

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 220135531 - 2³ = 220135523 is a prime.

It is a super-2 number, since 2×220135531² = 96919304017303922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220135541) 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 7 ways as a sum of consecutive naturals, for example, 1429375 + ... + 1429528.

It is an arithmetic number, because the mean of its divisors is an integer number (34306848).

Almost surely, 2^220135531 is an apocalyptic number.

220135531 is a deficient number, since it is larger than the sum of its proper divisors (54319253).

220135531 is a wasteful number, since it uses less digits than its factorization.

220135531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2858921.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 220135531 is about 14836.9650198415. The cubic root of 220135531 is about 603.8050141406.

Adding to 220135531 its reverse (135531022), we get a palindrome (355666553).

The spelling of 220135531 in words is "two hundred twenty million, one hundred thirty-five thousand, five hundred thirty-one".