16631441 has 4 divisors (see below), whose sum is σ = 17506800. Its totient is φ = 15756084.

The previous prime is 16631437. The next prime is 16631449. The reversal of 16631441 is 14413661.

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.

It is a cyclic number.

It is not a de Polignac number, because 16631441 - 2² = 16631437 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16631441.

It is not an unprimeable number, because it can be changed into a prime (16631449) 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, 437651 + ... + 437688.

It is an arithmetic number, because the mean of its divisors is an integer number (4376700).

Almost surely, 2^16631441 is an apocalyptic number.

It is an amenable number.

16631441 is a deficient number, since it is larger than the sum of its proper divisors (875359).

16631441 is an equidigital number, since it uses as much as digits as its factorization.

16631441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875358.

The product of its digits is 1728, while the sum is 26.

The square root of 16631441 is about 4078.1663771847. The cubic root of 16631441 is about 255.2563921282.

The spelling of 16631441 in words is "sixteen million, six hundred thirty-one thousand, four hundred forty-one".