16131407 has 4 divisors (see below), whose sum is σ = 16506600. Its totient is φ = 15756216.

The previous prime is 16131397. The next prime is 16131421. The reversal of 16131407 is 70413161.

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 16131407 - 2⁶ = 16131343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16131497) 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, 187532 + ... + 187617.

It is an arithmetic number, because the mean of its divisors is an integer number (4126650).

Almost surely, 2^16131407 is an apocalyptic number.

16131407 is a deficient number, since it is larger than the sum of its proper divisors (375193).

16131407 is an equidigital number, since it uses as much as digits as its factorization.

16131407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375192.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 16131407 is about 4016.3922866174. The cubic root of 16131407 is about 252.6721735243.

Adding to 16131407 its reverse (70413161), we get a palindrome (86544568).

The spelling of 16131407 in words is "sixteen million, one hundred thirty-one thousand, four hundred seven".