16541220 has 48 divisors (see below), whose sum is σ = 47573568. Its totient is φ = 4291200.

The previous prime is 16541219. The next prime is 16541251. The reversal of 16541220 is 2214561.

16541220 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×16541220² = 547223918176800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1506 + ... + 5945.

It is an arithmetic number, because the mean of its divisors is an integer number (991116).

Almost surely, 2^16541220 is an apocalyptic number.

16541220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16541220 is an abundant number, since it is smaller than the sum of its proper divisors (31032348).

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

16541220 is a wasteful number, since it uses less digits than its factorization.

16541220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7500 (or 7498 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 16541220 is about 4067.0898686899. The cubic root of 16541220 is about 254.7939897063.

Adding to 16541220 its reverse (2214561), we get a palindrome (18755781).

It can be divided in two parts, 16541 and 220, that added together give a palindrome (16761).

The spelling of 16541220 in words is "sixteen million, five hundred forty-one thousand, two hundred twenty".