16217401 has 4 divisors (see below), whose sum is σ = 16228432. Its totient is φ = 16206372.

The previous prime is 16217381. The next prime is 16217413. The reversal of 16217401 is 10471261.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 16217401 - 2⁷ = 16217273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16217701) 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, 2895 + ... + 6388.

It is an arithmetic number, because the mean of its divisors is an integer number (4057108).

Almost surely, 2^16217401 is an apocalyptic number.

It is an amenable number.

16217401 is a deficient number, since it is larger than the sum of its proper divisors (11031).

16217401 is an equidigital number, since it uses as much as digits as its factorization.

16217401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11030.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 16217401 is about 4027.0834359372. The cubic root of 16217401 is about 253.1203632946.

Adding to 16217401 its reverse (10471261), we get a palindrome (26688662).

The spelling of 16217401 in words is "sixteen million, two hundred seventeen thousand, four hundred one".