13422531 has 8 divisors (see below), whose sum is σ = 18838720.
Its totient is φ = 8477352.
The previous prime is 13422517. The next prime is 13422533. The reversal of 13422531 is 13522431.
Adding to 13422531 its reverse (13522431), we get a palindrome (26944962).
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 13422531 - 25 = 13422499 is a prime.
It is a super-2 number, since 2×134225312 = 360328676891922, which contains 22 as substring.
It is a Duffinian number.
It is a zygodrome in base 2.
It is a junction number, because it is equal to n+sod(n) for n = 13422498 and 13422507.
It is not an unprimeable number, because it can be changed into a prime (13422533) 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, 117685 + ... + 117798.
It is an arithmetic number, because the mean of its divisors is an integer number (2354840).
Almost surely, 213422531 is an apocalyptic number.
13422531 is a deficient number, since it is larger than the sum of its proper divisors (5416189).
13422531 is a wasteful number, since it uses less digits than its factorization.
13422531 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 235505.
The product of its digits is 720, while the sum is 21.
The square root of 13422531 is about 3663.6772510689.
The cubic root of 13422531 is about 237.6538231579.
The spelling of 13422531 in words is "thirteen million, four hundred twenty-two thousand, five hundred thirty-one".