16220577 has 4 divisors (see below), whose sum is σ = 21627440. Its totient is φ = 10813716.

The previous prime is 16220563. The next prime is 16220609. The reversal of 16220577 is 77502261.

16220577 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 semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 16220577 - 2⁶ = 16220513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16220537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2703427 + ... + 2703432.

It is an arithmetic number, because the mean of its divisors is an integer number (5406860).

Almost surely, 2^16220577 is an apocalyptic number.

It is an amenable number.

16220577 is a deficient number, since it is larger than the sum of its proper divisors (5406863).

16220577 is an equidigital number, since it uses as much as digits as its factorization.

16220577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5406862.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 16220577 is about 4027.4777466797. The cubic root of 16220577 is about 253.1368858311.

The spelling of 16220577 in words is "sixteen million, two hundred twenty thousand, five hundred seventy-seven".