225342521 has 2 divisors, whose sum is σ = 225342522. Its totient is φ = 225342520.

The previous prime is 225342493. The next prime is 225342539. The reversal of 225342521 is 125243522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 224670121 + 672400 = 14989^2 + 820^2 .

It is a cyclic number.

It is not a de Polignac number, because 225342521 - 2⁶ = 225342457 is a prime.

It is not a weakly prime, because it can be changed into another prime (225342541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112671260 + 112671261.

It is an arithmetic number, because the mean of its divisors is an integer number (112671261).

Almost surely, 2^225342521 is an apocalyptic number.

It is an amenable number.

225342521 is a deficient number, since it is larger than the sum of its proper divisors (1).

225342521 is an equidigital number, since it uses as much as digits as its factorization.

225342521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4800, while the sum is 26.

The square root of 225342521 is about 15011.4130247622. The cubic root of 225342521 is about 608.5286774337.

The spelling of 225342521 in words is "two hundred twenty-five million, three hundred forty-two thousand, five hundred twenty-one".