16550131 has 4 divisors (see below), whose sum is σ = 17823232. Its totient is φ = 15277032.

The previous prime is 16550119. The next prime is 16550153. The reversal of 16550131 is 13105561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16550131 - 2⁵ = 16550099 is a prime.

It is a super-2 number, since 2×16550131² = 547813672234322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16551131) 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, 636531 + ... + 636556.

It is an arithmetic number, because the mean of its divisors is an integer number (4455808).

Almost surely, 2^16550131 is an apocalyptic number.

16550131 is a deficient number, since it is larger than the sum of its proper divisors (1273101).

16550131 is a wasteful number, since it uses less digits than its factorization.

16550131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273100.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 16550131 is about 4068.1852219386. The cubic root of 16550131 is about 254.8397352570.

Adding to 16550131 its reverse (13105561), we get a palindrome (29655692).

The spelling of 16550131 in words is "sixteen million, five hundred fifty thousand, one hundred thirty-one".