13561031 has 8 divisors (see below), whose sum is σ = 14820624. Its totient is φ = 12305920.

The previous prime is 13561027. The next prime is 13561049. The reversal of 13561031 is 13016531.

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 13561031 - 2² = 13561027 is a prime.

It is a super-2 number, since 2×13561031² = 367803123565922, 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 = 13560994 and 13561012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13561021) 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, 10535 + ... + 11751.

It is an arithmetic number, because the mean of its divisors is an integer number (1852578).

Almost surely, 2^13561031 is an apocalyptic number.

13561031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13561031 is a deficient number, since it is larger than the sum of its proper divisors (1259593).

13561031 is a wasteful number, since it uses less digits than its factorization.

13561031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2241.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 13561031 is about 3682.5305158274. The cubic root of 13561031 is about 238.4684357433.

Adding to 13561031 its reverse (13016531), we get a palindrome (26577562).

The spelling of 13561031 in words is "thirteen million, five hundred sixty-one thousand, thirty-one".