13531202501 has 4 divisors (see below), whose sum is σ = 13670699532. Its totient is φ = 13391705472.

The previous prime is 13531202467. The next prime is 13531202533. The reversal of 13531202501 is 10520213531.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8244458401 + 5286744100 = 90799^2 + 72710^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13531202501 is a prime.

It is a super-2 number, since 2×13531202501² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13531202801) 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, 69748370 + ... + 69748563.

It is an arithmetic number, because the mean of its divisors is an integer number (3417674883).

Almost surely, 2^13531202501 is an apocalyptic number.

It is an amenable number.

13531202501 is a deficient number, since it is larger than the sum of its proper divisors (139497031).

13531202501 is an equidigital number, since it uses as much as digits as its factorization.

13531202501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139497030.

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

The spelling of 13531202501 in words is "thirteen billion, five hundred thirty-one million, two hundred two thousand, five hundred one".