16225690 has 24 divisors (see below), whose sum is σ = 31628988. Its totient is φ = 5990400.

The previous prime is 16225687. The next prime is 16225691. The reversal of 16225690 is 9652261.

It can be written as a sum of positive squares in 6 ways, for example, as 3316041 + 12909649 = 1821^2 + 3593^2 .

It is a super-2 number, since 2×16225690² = 526546031952200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (16225691) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3111 + ... + 6490.

Almost surely, 2^16225690 is an apocalyptic number.

16225690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16225690 is a deficient number, since it is larger than the sum of its proper divisors (15403298).

16225690 is a wasteful number, since it uses less digits than its factorization.

16225690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9634 (or 9621 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 16225690 is about 4028.1124611907. The cubic root of 16225690 is about 253.1634807118.

It can be divided in two parts, 162 and 25690, that added together give a palindrome (25852).

The spelling of 16225690 in words is "sixteen million, two hundred twenty-five thousand, six hundred ninety".