13890551 has 4 divisors (see below), whose sum is σ = 14494512. Its totient is φ = 13286592.

The previous prime is 13890509. The next prime is 13890553. The reversal of 13890551 is 15509831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15509831 = 17 ⋅912343.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13890551 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13890553) 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, 301946 + ... + 301991.

It is an arithmetic number, because the mean of its divisors is an integer number (3623628).

Almost surely, 2^13890551 is an apocalyptic number.

13890551 is a deficient number, since it is larger than the sum of its proper divisors (603961).

13890551 is an equidigital number, since it uses as much as digits as its factorization.

13890551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603960.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 13890551 is about 3727.0029514343. The cubic root of 13890551 is about 240.3845167182.

It can be divided in two parts, 13890 and 551, that added together give a palindrome (14441).

The spelling of 13890551 in words is "thirteen million, eight hundred ninety thousand, five hundred fifty-one".