225521953 has 2 divisors, whose sum is σ = 225521954. Its totient is φ = 225521952.

The previous prime is 225521939. The next prime is 225521957. The reversal of 225521953 is 359125522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 225510289 + 11664 = 15017^2 + 108^2 .

It is a cyclic number.

It is not a de Polignac number, because 225521953 - 2²⁵ = 191967521 is a prime.

It is not a weakly prime, because it can be changed into another prime (225521957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112760976 + 112760977.

It is an arithmetic number, because the mean of its divisors is an integer number (112760977).

Almost surely, 2^225521953 is an apocalyptic number.

It is an amenable number.

225521953 is a deficient number, since it is larger than the sum of its proper divisors (1).

225521953 is an equidigital number, since it uses as much as digits as its factorization.

225521953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27000, while the sum is 34.

The square root of 225521953 is about 15017.3883548372. The cubic root of 225521953 is about 608.6901509523.

The spelling of 225521953 in words is "two hundred twenty-five million, five hundred twenty-one thousand, nine hundred fifty-three".