16220745 has 12 divisors (see below), whose sum is σ = 28116036. Its totient is φ = 8651040.

The previous prime is 16220713. The next prime is 16220759. The reversal of 16220745 is 54702261.

16220745 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 can be written as a sum of positive squares in 2 ways, for example, as 1750329 + 14470416 = 1323^2 + 3804^2 .

It is not a de Polignac number, because 16220745 - 2⁵ = 16220713 is a prime.

It is a super-2 number, since 2×16220745² = 526225136710050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 180186 + ... + 180275.

It is an arithmetic number, because the mean of its divisors is an integer number (2343003).

Almost surely, 2^16220745 is an apocalyptic number.

16220745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16220745 is a deficient number, since it is larger than the sum of its proper divisors (11895291).

16220745 is a wasteful number, since it uses less digits than its factorization.

16220745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360472 (or 360469 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 16220745 is about 4027.4986033517. The cubic root of 16220745 is about 253.1377597592.

The spelling of 16220745 in words is "sixteen million, two hundred twenty thousand, seven hundred forty-five".