16061431 has 4 divisors (see below), whose sum is σ = 16083792. Its totient is φ = 16039072.

The previous prime is 16061399. The next prime is 16061443. The reversal of 16061431 is 13416061.

It is a happy number.

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 16061431 - 2⁵ = 16061399 is a prime.

It is a super-2 number, since 2×16061431² = 515939131535522, which contains 22 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 (16061471) 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, 10066 + ... + 11551.

It is an arithmetic number, because the mean of its divisors is an integer number (4020948).

Almost surely, 2^16061431 is an apocalyptic number.

16061431 is a deficient number, since it is larger than the sum of its proper divisors (22361).

16061431 is an equidigital number, since it uses as much as digits as its factorization.

16061431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22360.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 16061431 is about 4007.6715184755. The cubic root of 16061431 is about 252.3062906688.

Adding to 16061431 its reverse (13416061), we get a palindrome (29477492).

The spelling of 16061431 in words is "sixteen million, sixty-one thousand, four hundred thirty-one".