15897223 has 2 divisors, whose sum is σ = 15897224. Its totient is φ = 15897222.

The previous prime is 15897221. The next prime is 15897241. The reversal of 15897223 is 32279851.

15897223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (32279851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15897223 - 2¹ = 15897221 is a prime.

It is a super-2 number, since 2×15897223² = 505443398223458, which contains 22 as substring.

Together with 15897221, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15897221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7948611 + 7948612.

It is an arithmetic number, because the mean of its divisors is an integer number (7948612).

Almost surely, 2^15897223 is an apocalyptic number.

15897223 is a deficient number, since it is larger than the sum of its proper divisors (1).

15897223 is an equidigital number, since it uses as much as digits as its factorization.

15897223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 37.

The square root of 15897223 is about 3987.1321773927. The cubic root of 15897223 is about 251.4435051299.

The spelling of 15897223 in words is "fifteen million, eight hundred ninety-seven thousand, two hundred twenty-three".