13749231 has 8 divisors (see below), whose sum is σ = 18514224. Its totient is φ = 9075200.

The previous prime is 13749191. The next prime is 13749233. The reversal of 13749231 is 13294731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13749231 - 2¹¹ = 13747183 is a prime.

It is a super-2 number, since 2×13749231² = 378082706182722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13749233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22386 + ... + 22991.

It is an arithmetic number, because the mean of its divisors is an integer number (2314278).

Almost surely, 2^13749231 is an apocalyptic number.

13749231 is a deficient number, since it is larger than the sum of its proper divisors (4764993).

13749231 is a wasteful number, since it uses less digits than its factorization.

13749231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45481.

The product of its digits is 4536, while the sum is 30.

The square root of 13749231 is about 3707.9955501591. The cubic root of 13749231 is about 239.5665265858.

The spelling of 13749231 in words is "thirteen million, seven hundred forty-nine thousand, two hundred thirty-one".