225117457 has 2 divisors, whose sum is σ = 225117458. Its totient is φ = 225117456.

The previous prime is 225117421. The next prime is 225117469. The reversal of 225117457 is 754711522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 224970001 + 147456 = 14999^2 + 384^2 .

It is a cyclic number.

It is not a de Polignac number, because 225117457 - 2⁷ = 225117329 is a prime.

It is a super-2 number, since 2×225117457² = 101355738892293698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (225117157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112558728 + 112558729.

It is an arithmetic number, because the mean of its divisors is an integer number (112558729).

Almost surely, 2^225117457 is an apocalyptic number.

It is an amenable number.

225117457 is a deficient number, since it is larger than the sum of its proper divisors (1).

225117457 is an equidigital number, since it uses as much as digits as its factorization.

225117457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19600, while the sum is 34.

The square root of 225117457 is about 15003.9147224983. The cubic root of 225117457 is about 608.3260177682.

Adding to 225117457 its reverse (754711522), we get a palindrome (979828979).

The spelling of 225117457 in words is "two hundred twenty-five million, one hundred seventeen thousand, four hundred fifty-seven".