16402471 has 4 divisors (see below), whose sum is σ = 16647352. Its totient is φ = 16157592.

The previous prime is 16402469. The next prime is 16402481. The reversal of 16402471 is 17420461.

16402471 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 16402471 - 2¹ = 16402469 is a prime.

It is a super-3 number, since 3×16402471³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16402411) 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, 122340 + ... + 122473.

It is an arithmetic number, because the mean of its divisors is an integer number (4161838).

Almost surely, 2^16402471 is an apocalyptic number.

16402471 is a deficient number, since it is larger than the sum of its proper divisors (244881).

16402471 is an equidigital number, since it uses as much as digits as its factorization.

16402471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244880.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 16402471 is about 4049.9964197515. The cubic root of 16402471 is about 254.0795780582.

The spelling of 16402471 in words is "sixteen million, four hundred two thousand, four hundred seventy-one".