13531018 has 8 divisors (see below), whose sum is σ = 20728512. Its totient is φ = 6621516.

The previous prime is 13530991. The next prime is 13531019. The reversal of 13531018 is 81013531.

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

It is a self number, because there is not a number n which added to its sum of digits gives 13531018.

It is not an unprimeable number, because it can be changed into a prime (13531019) 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, 71880 + ... + 72067.

It is an arithmetic number, because the mean of its divisors is an integer number (2591064).

Almost surely, 2^13531018 is an apocalyptic number.

13531018 is a deficient number, since it is larger than the sum of its proper divisors (7197494).

13531018 is a wasteful number, since it uses less digits than its factorization.

13531018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143996.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 13531018 is about 3678.4532075317. The cubic root of 13531018 is about 238.2923812903.

Adding to 13531018 its reverse (81013531), we get a palindrome (94544549).

The spelling of 13531018 in words is "thirteen million, five hundred thirty-one thousand, eighteen".