320235455501 has 4 divisors (see below), whose sum is σ = 344868952092. Its totient is φ = 295601958912.

The previous prime is 320235455471. The next prime is 320235455503. The reversal of 320235455501 is 105554532023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 105554532023 = 17 ⋅6209090119.

It can be written as a sum of positive squares in 2 ways, for example, as 175967665225 + 144267790276 = 419485^2 + 379826^2 .

It is not a de Polignac number, because 320235455501 - 2²⁶ = 320168346637 is a prime.

It is a super-2 number, since 2×320235455501² (a number of 24 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 (320235455503) 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, 12316748276 + ... + 12316748301.

It is an arithmetic number, because the mean of its divisors is an integer number (86217238023).

Almost surely, 2^320235455501 is an apocalyptic number.

It is an amenable number.

320235455501 is a deficient number, since it is larger than the sum of its proper divisors (24633496591).

320235455501 is a wasteful number, since it uses less digits than its factorization.

320235455501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24633496590.

The product of its (nonzero) digits is 90000, while the sum is 35.

Adding to 320235455501 its reverse (105554532023), we get a palindrome (425789987524).

The spelling of 320235455501 in words is "three hundred twenty billion, two hundred thirty-five million, four hundred fifty-five thousand, five hundred one".