16081631 has 8 divisors (see below), whose sum is σ = 16951680. Its totient is φ = 15232672.

The previous prime is 16081603. The next prime is 16081633. The reversal of 16081631 is 13618061.

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-16081631 is a prime.

It is a super-2 number, since 2×16081631² = 517237711240322, which contains 22 as substring.

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 16081631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16081633) 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, 3695 + ... + 6768.

It is an arithmetic number, because the mean of its divisors is an integer number (2118960).

Almost surely, 2^16081631 is an apocalyptic number.

16081631 is a deficient number, since it is larger than the sum of its proper divisors (870049).

16081631 is a wasteful number, since it uses less digits than its factorization.

16081631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10545.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 16081631 is about 4010.1908932119. The cubic root of 16081631 is about 252.4120191466.

Adding to 16081631 its reverse (13618061), we get a palindrome (29699692).

The spelling of 16081631 in words is "sixteen million, eighty-one thousand, six hundred thirty-one".