13873531 has 8 divisors (see below), whose sum is σ = 16545024. Its totient is φ = 11374440.

The previous prime is 13873511. The next prime is 13873537. The reversal of 13873531 is 13537831.

It is a happy number.

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

It is not a de Polignac number, because 13873531 - 2⁷ = 13873403 is a prime.

It is a super-2 number, since 2×13873531² = 384949724815922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13873493 and 13873502.

It is not an unprimeable number, because it can be changed into a prime (13873537) 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, 42925 + ... + 43246.

It is an arithmetic number, because the mean of its divisors is an integer number (2068128).

Almost surely, 2^13873531 is an apocalyptic number.

13873531 is a deficient number, since it is larger than the sum of its proper divisors (2671493).

13873531 is an equidigital number, since it uses as much as digits as its factorization.

13873531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86201.

The product of its digits is 7560, while the sum is 31.

The square root of 13873531 is about 3724.7189155693. The cubic root of 13873531 is about 240.2862960730.

The spelling of 13873531 in words is "thirteen million, eight hundred seventy-three thousand, five hundred thirty-one".