455240320021 has 8 divisors (see below), whose sum is σ = 469037875544. Its totient is φ = 441521383680.

The previous prime is 455240320013. The next prime is 455240320033. The reversal of 455240320021 is 120023042554.

It can be written as a sum of positive squares in 4 ways, for example, as 118532849796 + 336707470225 = 344286^2 + 580265^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 455240320021 - 2³ = 455240320013 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 (455240320121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19643040 + ... + 19666201.

It is an arithmetic number, because the mean of its divisors is an integer number (58629734443).

Almost surely, 2^455240320021 is an apocalyptic number.

It is an amenable number.

455240320021 is a deficient number, since it is larger than the sum of its proper divisors (13797555523).

455240320021 is a wasteful number, since it uses less digits than its factorization.

455240320021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39309591.

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 455240320021 its reverse (120023042554), we get a palindrome (575263362575).

The spelling of 455240320021 in words is "four hundred fifty-five billion, two hundred forty million, three hundred twenty thousand, twenty-one".