220001540 has 48 divisors (see below), whose sum is σ = 521398080. Its totient is φ = 77239680.

The previous prime is 220001527. The next prime is 220001581. The reversal of 220001540 is 45100022.

220001540 is a modest number, since divided by 1540 gives 220 as remainder.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 10862 + ... + 23621.

It is an arithmetic number, because the mean of its divisors is an integer number (10862460).

Almost surely, 2^220001540 is an apocalyptic number.

220001540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220001540 is an abundant number, since it is smaller than the sum of its proper divisors (301396540).

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

220001540 is a wasteful number, since it uses less digits than its factorization.

220001540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34532 (or 34530 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 220001540 is about 14832.4488874899. The cubic root of 220001540 is about 603.6824822657.

Adding to 220001540 its reverse (45100022), we get a palindrome (265101562).

The spelling of 220001540 in words is "two hundred twenty million, one thousand, five hundred forty".