15601013 has 8 divisors (see below), whose sum is σ = 16072632. Its totient is φ = 15132096.

The previous prime is 15601009. The next prime is 15601031. The reversal of 15601013 is 31010651.

It can be written as a sum of positive squares in 4 ways, for example, as 2798929 + 12802084 = 1673^2 + 3578^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 15601013 - 2² = 15601009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15600982 and 15601000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15601073) 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, 20231 + ... + 20987.

It is an arithmetic number, because the mean of its divisors is an integer number (2009079).

Almost surely, 2^15601013 is an apocalyptic number.

It is an amenable number.

15601013 is a deficient number, since it is larger than the sum of its proper divisors (471619).

15601013 is an equidigital number, since it uses as much as digits as its factorization.

15601013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 15601013 is about 3949.8117676669. The cubic root of 15601013 is about 249.8720038124.

Adding to 15601013 its reverse (31010651), we get a palindrome (46611664).

The spelling of 15601013 in words is "fifteen million, six hundred one thousand, thirteen".