202131312319973 has 4 divisors (see below), whose sum is σ = 202134265409100. Its totient is φ = 202128359230848.

The previous prime is 202131312319943. The next prime is 202131312319991. The reversal of 202131312319973 is 379913213131202.

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 34343901374689 + 167787410945284 = 5860367^2 + 12953278^2 .

It is a cyclic number.

It is not a de Polignac number, because 202131312319973 - 2²⁰ = 202131311271397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202131312319943) 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, 1476441890 + ... + 1476578787.

It is an arithmetic number, because the mean of its divisors is an integer number (50533566352275).

Almost surely, 2^{202131312319973} is an apocalyptic number.

It is an amenable number.

202131312319973 is a deficient number, since it is larger than the sum of its proper divisors (2953089127).

202131312319973 is an equidigital number, since it uses as much as digits as its factorization.

202131312319973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2953089126.

The product of its (nonzero) digits is 367416, while the sum is 47.

The spelling of 202131312319973 in words is "two hundred two trillion, one hundred thirty-one billion, three hundred twelve million, three hundred nineteen thousand, nine hundred seventy-three".