16217970 has 16 divisors (see below), whose sum is σ = 38923200. Its totient is φ = 4324784.

The previous prime is 16217969. The next prime is 16217987. The reversal of 16217970 is 7971261.

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270270 + ... + 270329.

It is an arithmetic number, because the mean of its divisors is an integer number (2432700).

Almost surely, 2^16217970 is an apocalyptic number.

16217970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16217970 is an abundant number, since it is smaller than the sum of its proper divisors (22705230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16217970 is a wasteful number, since it uses less digits than its factorization.

16217970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540609.

The product of its (nonzero) digits is 5292, while the sum is 33.

The square root of 16217970 is about 4027.1540819790. The cubic root of 16217970 is about 253.1233235676.

It can be divided in two parts, 1621 and 7970, that added together give a triangular number (9591 = T₁₃₈).

The spelling of 16217970 in words is "sixteen million, two hundred seventeen thousand, nine hundred seventy".