16400271 has 8 divisors (see below), whose sum is σ = 22572544. Its totient is φ = 10580760.

The previous prime is 16400269. The next prime is 16400273. The reversal of 16400271 is 17200461.

It is an interprime number because it is at equal distance from previous prime (16400269) and next prime (16400273).

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

It is not a de Polignac number, because 16400271 - 2¹ = 16400269 is a prime.

It is a Duffinian number.

16400271 is a modest number, since divided by 271 gives 164 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16400273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88081 + ... + 88266.

It is an arithmetic number, because the mean of its divisors is an integer number (2821568).

Almost surely, 2^16400271 is an apocalyptic number.

16400271 is a deficient number, since it is larger than the sum of its proper divisors (6172273).

16400271 is a wasteful number, since it uses less digits than its factorization.

16400271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176381.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 16400271 is about 4049.7248054652. The cubic root of 16400271 is about 254.0682179799.

The spelling of 16400271 in words is "sixteen million, four hundred thousand, two hundred seventy-one".