220531040 has 24 divisors (see below), whose sum is σ = 521004960. Its totient is φ = 88212352.

The previous prime is 220531037. The next prime is 220531079. The reversal of 220531040 is 40135022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 689000 + ... + 689319.

It is an arithmetic number, because the mean of its divisors is an integer number (21708540).

Almost surely, 2^220531040 is an apocalyptic number.

220531040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220531040 is an abundant number, since it is smaller than the sum of its proper divisors (300473920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220531040 is a wasteful number, since it uses less digits than its factorization.

220531040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378334 (or 1378326 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 220531040 is about 14850.2875393037. The cubic root of 220531040 is about 604.1664088359.

Adding to 220531040 its reverse (40135022), we get a palindrome (260666062).

The spelling of 220531040 in words is "two hundred twenty million, five hundred thirty-one thousand, forty".