225378397 has 2 divisors, whose sum is σ = 225378398. Its totient is φ = 225378396.

The previous prime is 225378341. The next prime is 225378409. The reversal of 225378397 is 793873522.

225378397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166564836 + 58813561 = 12906^2 + 7669^2 .

It is a cyclic number.

It is not a de Polignac number, because 225378397 - 2¹⁹ = 224854109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225373397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112689198 + 112689199.

It is an arithmetic number, because the mean of its divisors is an integer number (112689199).

Almost surely, 2^225378397 is an apocalyptic number.

It is an amenable number.

225378397 is a deficient number, since it is larger than the sum of its proper divisors (1).

225378397 is an equidigital number, since it uses as much as digits as its factorization.

225378397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 46.

The square root of 225378397 is about 15012.6079346661. The cubic root of 225378397 is about 608.5609696323.

The spelling of 225378397 in words is "two hundred twenty-five million, three hundred seventy-eight thousand, three hundred ninety-seven".