16212071 has 4 divisors (see below), whose sum is σ = 16222392. Its totient is φ = 16201752.

The previous prime is 16212061. The next prime is 16212083. The reversal of 16212071 is 17021261.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 17021261 = 79 ⋅215459.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16212071 is a prime.

It is a super-2 number, since 2×16212071² = 525662492218082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16212061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2261 + ... + 6126.

It is an arithmetic number, because the mean of its divisors is an integer number (4055598).

Almost surely, 2^16212071 is an apocalyptic number.

16212071 is a deficient number, since it is larger than the sum of its proper divisors (10321).

16212071 is an equidigital number, since it uses as much as digits as its factorization.

16212071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10320.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 16212071 is about 4026.4216123004. The cubic root of 16212071 is about 253.0926301339.

The spelling of 16212071 in words is "sixteen million, two hundred twelve thousand, seventy-one".