15541223 has 2 divisors, whose sum is σ = 15541224. Its totient is φ = 15541222.

The previous prime is 15541171. The next prime is 15541231. The reversal of 15541223 is 32214551.

It is a strong prime.

It is an emirp because it is prime and its reverse (32214551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15541223 - 2⁶ = 15541159 is a prime.

It is a super-2 number, since 2×15541223² = 483059224671458, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15541523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7770611 + 7770612.

It is an arithmetic number, because the mean of its divisors is an integer number (7770612).

Almost surely, 2^15541223 is an apocalyptic number.

15541223 is a deficient number, since it is larger than the sum of its proper divisors (1).

15541223 is an equidigital number, since it uses as much as digits as its factorization.

15541223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1200, while the sum is 23.

The square root of 15541223 is about 3942.2357869615. The cubic root of 15541223 is about 249.5523883870.

Adding to 15541223 its reverse (32214551), we get a palindrome (47755774).

It can be divided in two parts, 15541 and 223, that multiplied together give a palindrome (3465643).

The spelling of 15541223 in words is "fifteen million, five hundred forty-one thousand, two hundred twenty-three".