15553423 has 2 divisors, whose sum is σ = 15553424. Its totient is φ = 15553422.

The previous prime is 15553409. The next prime is 15553427. The reversal of 15553423 is 32435551.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15553423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15553391 and 15553400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15553427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7776711 + 7776712.

It is an arithmetic number, because the mean of its divisors is an integer number (7776712).

Almost surely, 2^15553423 is an apocalyptic number.

15553423 is a deficient number, since it is larger than the sum of its proper divisors (1).

15553423 is an equidigital number, since it uses as much as digits as its factorization.

15553423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9000, while the sum is 28.

The square root of 15553423 is about 3943.7828287065. The cubic root of 15553423 is about 249.6176715980.

Adding to 15553423 its reverse (32435551), we get a palindrome (47988974).

The spelling of 15553423 in words is "fifteen million, five hundred fifty-three thousand, four hundred twenty-three".