225993997 has 2 divisors, whose sum is σ = 225993998. Its totient is φ = 225993996.

The previous prime is 225993983. The next prime is 225994019. The reversal of 225993997 is 799399522.

225993997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154405476 + 71588521 = 12426^2 + 8461^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225993997 is a prime.

It is a super-3 number, since 3×225993997³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225993947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112996998 + 112996999.

It is an arithmetic number, because the mean of its divisors is an integer number (112996999).

Almost surely, 2^225993997 is an apocalyptic number.

It is an amenable number.

225993997 is a deficient number, since it is larger than the sum of its proper divisors (1).

225993997 is an equidigital number, since it uses as much as digits as its factorization.

225993997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2755620, while the sum is 55.

The square root of 225993997 is about 15033.0967202370. The cubic root of 225993997 is about 609.1145417071.

The spelling of 225993997 in words is "two hundred twenty-five million, nine hundred ninety-three thousand, nine hundred ninety-seven".