225400247 has 6 divisors (see below), whose sum is σ = 231033624. Its totient is φ = 219901040.

The previous prime is 225400223. The next prime is 225400271. The reversal of 225400247 is 742004522.

It is an interprime number because it is at equal distance from previous prime (225400223) and next prime (225400271).

It is not a de Polignac number, because 225400247 - 2¹² = 225396151 is a prime.

It is a super-2 number, since 2×225400247² = 101610542695322018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225400277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 65363 + ... + 68724.

It is an arithmetic number, because the mean of its divisors is an integer number (38505604).

Almost surely, 2^225400247 is an apocalyptic number.

225400247 is a deficient number, since it is larger than the sum of its proper divisors (5633377).

225400247 is an equidigital number, since it uses as much as digits as its factorization.

225400247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134169 (or 134128 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 26.

The square root of 225400247 is about 15013.3356386914. The cubic root of 225400247 is about 608.5806352668.

Adding to 225400247 its reverse (742004522), we get a palindrome (967404769).

The spelling of 225400247 in words is "two hundred twenty-five million, four hundred thousand, two hundred forty-seven".