16217025 has 36 divisors (see below), whose sum is σ = 29487696. Its totient is φ = 7858400.

The previous prime is 16217009. The next prime is 16217029. The reversal of 16217025 is 52071261.

It is not a de Polignac number, because 16217025 - 2⁴ = 16217009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16216986 and 16217004.

It is not an unprimeable number, because it can be changed into a prime (16217029) 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, 8182 + ... + 9968.

Almost surely, 2^16217025 is an apocalyptic number.

16217025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16217025 is a deficient number, since it is larger than the sum of its proper divisors (13270671).

16217025 is a wasteful number, since it uses less digits than its factorization.

16217025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1822 (or 1806 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 16217025 is about 4027.0367517568. The cubic root of 16217025 is about 253.1184070833.

Adding to 16217025 its reverse (52071261), we get a palindrome (68288286).

It can be divided in two parts, 1621 and 7025, that added together give a triangular number (8646 = T₁₃₁).

The spelling of 16217025 in words is "sixteen million, two hundred seventeen thousand, twenty-five".