320215587101 has 4 divisors (see below), whose sum is σ = 321841047132. Its totient is φ = 318590127072.

The previous prime is 320215587071. The next prime is 320215587103. The reversal of 320215587101 is 101785512023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101785512023 = 13 ⋅7829654771.

It can be written as a sum of positive squares in 2 ways, for example, as 287002347076 + 33213240025 = 535726^2 + 182245^2 .

It is a cyclic number.

It is not a de Polignac number, because 320215587101 - 2³⁴ = 303035717917 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 (320215587103) 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, 812729720 + ... + 812730113.

It is an arithmetic number, because the mean of its divisors is an integer number (80460261783).

Almost surely, 2^320215587101 is an apocalyptic number.

It is an amenable number.

320215587101 is a deficient number, since it is larger than the sum of its proper divisors (1625460031).

320215587101 is a wasteful number, since it uses less digits than its factorization.

320215587101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1625460030.

The product of its (nonzero) digits is 16800, while the sum is 35.

The spelling of 320215587101 in words is "three hundred twenty billion, two hundred fifteen million, five hundred eighty-seven thousand, one hundred one".