225991027 has 2 divisors, whose sum is σ = 225991028. Its totient is φ = 225991026.

The previous prime is 225991001. The next prime is 225991049. The reversal of 225991027 is 720199522.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225991027 is a prime.

It is not a weakly prime, because it can be changed into another prime (225991427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112995513 + 112995514.

It is an arithmetic number, because the mean of its divisors is an integer number (112995514).

Almost surely, 2^225991027 is an apocalyptic number.

225991027 is a deficient number, since it is larger than the sum of its proper divisors (1).

225991027 is an equidigital number, since it uses as much as digits as its factorization.

225991027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 225991027 is about 15032.9979378699. The cubic root of 225991027 is about 609.1118733794. Note that the first 3 decimals are identical.

The spelling of 225991027 in words is "two hundred twenty-five million, nine hundred ninety-one thousand, twenty-seven".