16131081 has 16 divisors (see below), whose sum is σ = 22155840. Its totient is φ = 10433280.

The previous prime is 16131061. The next prime is 16131091. The reversal of 16131081 is 18013161.

It is not a de Polignac number, because 16131081 - 2⁷ = 16130953 is a prime.

It is a super-2 number, since 2×16131081² = 520423548457122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16131061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38290 + ... + 38708.

It is an arithmetic number, because the mean of its divisors is an integer number (1384740).

Almost surely, 2^16131081 is an apocalyptic number.

It is an amenable number.

16131081 is a deficient number, since it is larger than the sum of its proper divisors (6024759).

16131081 is a wasteful number, since it uses less digits than its factorization.

16131081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 16131081 is about 4016.3517027272. The cubic root of 16131081 is about 252.6704714268.

The spelling of 16131081 in words is "sixteen million, one hundred thirty-one thousand, eighty-one".