16638131 has 8 divisors (see below), whose sum is σ = 17690400. Its totient is φ = 15613312.

The previous prime is 16638113. The next prime is 16638137. The reversal of 16638131 is 13183661.

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

It is a cyclic number.

It is not a de Polignac number, because 16638131 - 2¹⁸ = 16375987 is a prime.

It is a super-2 number, since 2×16638131² = 553654806346322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16638094 and 16638103.

It is not an unprimeable number, because it can be changed into a prime (16638137) 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, 5606 + ... + 8043.

It is an arithmetic number, because the mean of its divisors is an integer number (2211300).

Almost surely, 2^16638131 is an apocalyptic number.

16638131 is a deficient number, since it is larger than the sum of its proper divisors (1052269).

16638131 is a wasteful number, since it uses less digits than its factorization.

16638131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13725.

The product of its digits is 2592, while the sum is 29.

The square root of 16638131 is about 4078.9865162807. The cubic root of 16638131 is about 255.2906131826.

The spelling of 16638131 in words is "sixteen million, six hundred thirty-eight thousand, one hundred thirty-one".