13531520201 has 4 divisors (see below), whose sum is σ = 13531752900. Its totient is φ = 13531287504.

The previous prime is 13531520159. The next prime is 13531520221. The reversal of 13531520201 is 10202513531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 8344639801 + 5186880400 = 91349^2 + 72020^2 .

It is a cyclic number.

It is not a de Polignac number, because 13531520201 - 2⁶ = 13531520137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13531520221) 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, 54635 + ... + 173343.

It is an arithmetic number, because the mean of its divisors is an integer number (3382938225).

Almost surely, 2^13531520201 is an apocalyptic number.

It is an amenable number.

13531520201 is a deficient number, since it is larger than the sum of its proper divisors (232699).

13531520201 is a wasteful number, since it uses less digits than its factorization.

13531520201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232698.

The product of its (nonzero) digits is 900, while the sum is 23.

The spelling of 13531520201 in words is "thirteen billion, five hundred thirty-one million, five hundred twenty thousand, two hundred one".