225255451315021 has 2 divisors, whose sum is σ = 225255451315022. Its totient is φ = 225255451315020.

The previous prime is 225255451314991. The next prime is 225255451315033. The reversal of 225255451315021 is 120513154552522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127557824222500 + 97697627092521 = 11294150^2 + 9884211^2 .

It is a cyclic number.

It is not a de Polignac number, because 225255451315021 - 2¹³ = 225255451306829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225255451315051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112627725657510 + 112627725657511.

It is an arithmetic number, because the mean of its divisors is an integer number (112627725657511).

Almost surely, 2^{225255451315021} is an apocalyptic number.

It is an amenable number.

225255451315021 is a deficient number, since it is larger than the sum of its proper divisors (1).

225255451315021 is an equidigital number, since it uses as much as digits as its factorization.

225255451315021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600000, while the sum is 43.

The spelling of 225255451315021 in words is "two hundred twenty-five trillion, two hundred fifty-five billion, four hundred fifty-one million, three hundred fifteen thousand, twenty-one".