16147220 has 24 divisors (see below), whose sum is σ = 33985224. Its totient is φ = 6444416.

The previous prime is 16147217. The next prime is 16147223. The reversal of 16147220 is 2274161.

16147220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (16147217) and next prime (16147223).

It can be written as a sum of positive squares in 4 ways, for example, as 51076 + 16096144 = 226^2 + 4012^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16147223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15434 + ... + 16446.

It is an arithmetic number, because the mean of its divisors is an integer number (1416051).

Almost surely, 2^16147220 is an apocalyptic number.

16147220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16147220 is an abundant number, since it is smaller than the sum of its proper divisors (17838004).

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

16147220 is a wasteful number, since it uses less digits than its factorization.

16147220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1819 (or 1817 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 16147220 is about 4018.3603621378. The cubic root of 16147220 is about 252.7547081774.

The spelling of 16147220 in words is "sixteen million, one hundred forty-seven thousand, two hundred twenty".