201631627973 has 4 divisors (see below), whose sum is σ = 202676351628. Its totient is φ = 200586904320.

The previous prime is 201631627943. The next prime is 201631627987. The reversal of 201631627973 is 379726136102.

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 34286817889 + 167344810084 = 185167^2 + 409078^2 .

It is a cyclic number.

It is not a de Polignac number, because 201631627973 - 2¹⁰ = 201631626949 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 (201631627913) 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, 522361538 + ... + 522361923.

It is an arithmetic number, because the mean of its divisors is an integer number (50669087907).

Almost surely, 2^201631627973 is an apocalyptic number.

It is an amenable number.

201631627973 is a deficient number, since it is larger than the sum of its proper divisors (1044723655).

201631627973 is a wasteful number, since it uses less digits than its factorization.

201631627973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044723654.

The product of its (nonzero) digits is 571536, while the sum is 47.

The spelling of 201631627973 in words is "two hundred one billion, six hundred thirty-one million, six hundred twenty-seven thousand, nine hundred seventy-three".