13661351 has 4 divisors (see below), whose sum is σ = 14903304. Its totient is φ = 12419400.

The previous prime is 13661341. The next prime is 13661357. The reversal of 13661351 is 15316631.

13661351 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13661351 - 2¹⁸ = 13399207 is a prime.

It is a super-2 number, since 2×13661351² = 373265022290402, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13661351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13661357) 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, 620960 + ... + 620981.

It is an arithmetic number, because the mean of its divisors is an integer number (3725826).

Almost surely, 2^13661351 is an apocalyptic number.

13661351 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13661351 is a deficient number, since it is larger than the sum of its proper divisors (1241953).

13661351 is a wasteful number, since it uses less digits than its factorization.

13661351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241952.

The product of its digits is 1620, while the sum is 26.

The square root of 13661351 is about 3696.1264859309. The cubic root of 13661351 is about 239.0550283823.

Adding to 13661351 its reverse (15316631), we get a palindrome (28977982).

The spelling of 13661351 in words is "thirteen million, six hundred sixty-one thousand, three hundred fifty-one".