16155225 has 36 divisors (see below), whose sum is σ = 30466800. Its totient is φ = 8160480.

The previous prime is 16155221. The next prime is 16155239. The reversal of 16155225 is 52255161.

16155225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16155225 - 2² = 16155221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16155221) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2386 + ... + 6164.

It is an arithmetic number, because the mean of its divisors is an integer number (846300).

Almost surely, 2^16155225 is an apocalyptic number.

16155225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16155225 is a deficient number, since it is larger than the sum of its proper divisors (14311575).

16155225 is a wasteful number, since it uses less digits than its factorization.

16155225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3814 (or 3806 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 16155225 is about 4019.3562917462. The cubic root of 16155225 is about 252.7964690746.

The spelling of 16155225 in words is "sixteen million, one hundred fifty-five thousand, two hundred twenty-five".