16531061 has 8 divisors (see below), whose sum is σ = 16867224. Its totient is φ = 16197120.

The previous prime is 16531051. The next prime is 16531063. The reversal of 16531061 is 16013561.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1976836 + 14554225 = 1406^2 + 3815^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16531061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16531063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27581 + ... + 28173.

It is an arithmetic number, because the mean of its divisors is an integer number (2108403).

Almost surely, 2^16531061 is an apocalyptic number.

It is an amenable number.

16531061 is a deficient number, since it is larger than the sum of its proper divisors (336163).

16531061 is an equidigital number, since it uses as much as digits as its factorization.

16531061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 16531061 is about 4065.8407494638. The cubic root of 16531061 is about 254.7418173709.

The spelling of 16531061 in words is "sixteen million, five hundred thirty-one thousand, sixty-one".