15226231 has 2 divisors, whose sum is σ = 15226232. Its totient is φ = 15226230.

The previous prime is 15226229. The next prime is 15226273. The reversal of 15226231 is 13262251.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15226231 - 2¹ = 15226229 is a prime.

It is a super-2 number, since 2×15226231² = 463676220930722, which contains 22 as substring.

Together with 15226229, 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 (15226531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7613115 + 7613116.

It is an arithmetic number, because the mean of its divisors is an integer number (7613116).

Almost surely, 2^15226231 is an apocalyptic number.

15226231 is a deficient number, since it is larger than the sum of its proper divisors (1).

15226231 is an equidigital number, since it uses as much as digits as its factorization.

15226231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 22.

The square root of 15226231 is about 3902.0803425865. The cubic root of 15226231 is about 247.8548784590.

Adding to 15226231 its reverse (13262251), we get a palindrome (28488482).

The spelling of 15226231 in words is "fifteen million, two hundred twenty-six thousand, two hundred thirty-one".