13731122 has 4 divisors (see below), whose sum is σ = 20596686. Its totient is φ = 6865560.

The previous prime is 13731119. The next prime is 13731127. The reversal of 13731122 is 22113731.

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

It can be written as a sum of positive squares in only one way, i.e., 7284601 + 6446521 = 2699^2 + 2539^2 .

It is a super-2 number, since 2×13731122² = 377087422757768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13731094 and 13731103.

It is not an unprimeable number, because it can be changed into a prime (13731127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3432779 + ... + 3432782.

Almost surely, 2^13731122 is an apocalyptic number.

13731122 is a deficient number, since it is larger than the sum of its proper divisors (6865564).

13731122 is an equidigital number, since it uses as much as digits as its factorization.

13731122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6865563.

The product of its digits is 252, while the sum is 20.

The square root of 13731122 is about 3705.5528602356. The cubic root of 13731122 is about 239.4613033367.

Adding to 13731122 its reverse (22113731), we get a palindrome (35844853).

The spelling of 13731122 in words is "thirteen million, seven hundred thirty-one thousand, one hundred twenty-two".