225777006421 has 2 divisors, whose sum is σ = 225777006422. Its totient is φ = 225777006420.

The previous prime is 225777006383. The next prime is 225777006437. The reversal of 225777006421 is 124600777522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 213213062500 + 12563943921 = 461750^2 + 112089^2 .

It is a cyclic number.

It is not a de Polignac number, because 225777006421 - 2³⁷ = 88338052949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225777006491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112888503210 + 112888503211.

It is an arithmetic number, because the mean of its divisors is an integer number (112888503211).

Almost surely, 2^225777006421 is an apocalyptic number.

It is an amenable number.

225777006421 is a deficient number, since it is larger than the sum of its proper divisors (1).

225777006421 is an equidigital number, since it uses as much as digits as its factorization.

225777006421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 329280, while the sum is 43.

The spelling of 225777006421 in words is "two hundred twenty-five billion, seven hundred seventy-seven million, six thousand, four hundred twenty-one".