13112251 has 4 divisors (see below), whose sum is σ = 13432104. Its totient is φ = 12792400.

The previous prime is 13112249. The next prime is 13112273. The reversal of 13112251 is 15221131.

13112251 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, and also an emirpimes, since its reverse is a distinct semiprime: 15221131 = 947 ⋅16073.

It is a cyclic number.

It is not a de Polignac number, because 13112251 - 2¹ = 13112249 is a prime.

It is a super-2 number, since 2×13112251² = 343862252574002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13112221) 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, 159865 + ... + 159946.

It is an arithmetic number, because the mean of its divisors is an integer number (3358026).

Almost surely, 2^13112251 is an apocalyptic number.

13112251 is a deficient number, since it is larger than the sum of its proper divisors (319853).

13112251 is an equidigital number, since it uses as much as digits as its factorization.

13112251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319852.

The product of its digits is 60, while the sum is 16.

The square root of 13112251 is about 3621.0842298958. The cubic root of 13112251 is about 235.8082985519.

Adding to 13112251 its reverse (15221131), we get a palindrome (28333382).

The spelling of 13112251 in words is "thirteen million, one hundred twelve thousand, two hundred fifty-one".