455621401321 has 2 divisors, whose sum is σ = 455621401322. Its totient is φ = 455621401320.

The previous prime is 455621401273. The next prime is 455621401397. The reversal of 455621401321 is 123104126554.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 449987397721 + 5634003600 = 670811^2 + 75060^2 .

It is a cyclic number.

It is not a de Polignac number, because 455621401321 - 2¹¹ = 455621399273 is a prime.

It is a super-2 number, since 2×455621401321² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (455621405321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 227810700660 + 227810700661.

It is an arithmetic number, because the mean of its divisors is an integer number (227810700661).

Almost surely, 2^455621401321 is an apocalyptic number.

It is an amenable number.

455621401321 is a deficient number, since it is larger than the sum of its proper divisors (1).

455621401321 is an equidigital number, since it uses as much as digits as its factorization.

455621401321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 34.

Adding to 455621401321 its reverse (123104126554), we get a palindrome (578725527875).

The spelling of 455621401321 in words is "four hundred fifty-five billion, six hundred twenty-one million, four hundred one thousand, three hundred twenty-one".