16345231 has 16 divisors (see below), whose sum is σ = 19339264. Its totient is φ = 13522464.

The previous prime is 16345229. The next prime is 16345261. The reversal of 16345231 is 13254361.

It is not a de Polignac number, because 16345231 - 2¹ = 16345229 is a prime.

It is a super-2 number, since 2×16345231² = 534333152886722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16345196 and 16345205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16345261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57616 + ... + 57898.

It is an arithmetic number, because the mean of its divisors is an integer number (1208704).

Almost surely, 2^16345231 is an apocalyptic number.

16345231 is a deficient number, since it is larger than the sum of its proper divisors (2994033).

16345231 is a wasteful number, since it uses less digits than its factorization.

16345231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550.

The product of its digits is 2160, while the sum is 25.

The square root of 16345231 is about 4042.9235708828. The cubic root of 16345231 is about 253.7836782206.

Adding to 16345231 its reverse (13254361), we get a palindrome (29599592).

The spelling of 16345231 in words is "sixteen million, three hundred forty-five thousand, two hundred thirty-one".