201531001013409 has 8 divisors (see below), whose sum is σ = 268709606047072. Its totient is φ = 134353198327680.

The previous prime is 201531001013383. The next prime is 201531001013413. The reversal of 201531001013409 is 904310100135102.

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

It is not a de Polignac number, because 201531001013409 - 2³³ = 201522411078817 is a prime.

It is a super-2 number, since 2×201531001013409² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201531001013479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200000659 + ... + 201005784.

It is an arithmetic number, because the mean of its divisors is an integer number (33588700755884).

Almost surely, 2^{201531001013409} is an apocalyptic number.

It is an amenable number.

201531001013409 is a deficient number, since it is larger than the sum of its proper divisors (67178605033663).

201531001013409 is a wasteful number, since it uses less digits than its factorization.

201531001013409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401173967.

The product of its (nonzero) digits is 3240, while the sum is 30.

The spelling of 201531001013409 in words is "two hundred one trillion, five hundred thirty-one billion, one million, thirteen thousand, four hundred nine".