13144431 has 16 divisors (see below), whose sum is σ = 18399744. Its totient is φ = 8330784.

The previous prime is 13144423. The next prime is 13144459. The reversal of 13144431 is 13444131.

13144431 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13144431 - 2³ = 13144423 is a prime.

It is a super-2 number, since 2×13144431² = 345552132627522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13144398 and 13144407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13144331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13110 + ... + 14076.

It is an arithmetic number, because the mean of its divisors is an integer number (1149984).

Almost surely, 2^13144431 is an apocalyptic number.

13144431 is a deficient number, since it is larger than the sum of its proper divisors (5255313).

13144431 is a wasteful number, since it uses less digits than its factorization.

13144431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190.

The product of its digits is 576, while the sum is 21.

The square root of 13144431 is about 3625.5249275105. The cubic root of 13144431 is about 236.0010473476.

Adding to 13144431 its reverse (13444131), we get a palindrome (26588562).

The spelling of 13144431 in words is "thirteen million, one hundred forty-four thousand, four hundred thirty-one".