16507243 has 2 divisors, whose sum is σ = 16507244. Its totient is φ = 16507242.

The previous prime is 16507241. The next prime is 16507247. The reversal of 16507243 is 34270561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16507243 - 2¹ = 16507241 is a prime.

It is a super-2 number, since 2×16507243² = 544978142922098, which contains 22 as substring.

Together with 16507241, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16507241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8253621 + 8253622.

It is an arithmetic number, because the mean of its divisors is an integer number (8253622).

Almost surely, 2^16507243 is an apocalyptic number.

16507243 is a deficient number, since it is larger than the sum of its proper divisors (1).

16507243 is an equidigital number, since it uses as much as digits as its factorization.

16507243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 16507243 is about 4062.9106561676. The cubic root of 16507243 is about 254.6194143194.

The spelling of 16507243 in words is "sixteen million, five hundred seven thousand, two hundred forty-three".