13423551 has 4 divisors (see below), whose sum is σ = 17898072. Its totient is φ = 8949032.

The previous prime is 13423547. The next prime is 13423573. The reversal of 13423551 is 15532431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15532431 = 3 ⋅5177477.

It is a cyclic number.

It is not a de Polignac number, because 13423551 - 2² = 13423547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13423511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2237256 + ... + 2237261.

It is an arithmetic number, because the mean of its divisors is an integer number (4474518).

Almost surely, 2^13423551 is an apocalyptic number.

13423551 is a deficient number, since it is larger than the sum of its proper divisors (4474521).

13423551 is an equidigital number, since it uses as much as digits as its factorization.

13423551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4474520.

The product of its digits is 1800, while the sum is 24.

The square root of 13423551 is about 3663.8164528262. The cubic root of 13423551 is about 237.6598429058.

Adding to 13423551 its reverse (15532431), we get a palindrome (28955982).

The spelling of 13423551 in words is "thirteen million, four hundred twenty-three thousand, five hundred fifty-one".