225381445 has 4 divisors (see below), whose sum is σ = 270457740. Its totient is φ = 180305152.

The previous prime is 225381433. The next prime is 225381451. The reversal of 225381445 is 544183522.

225381445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 75220929 + 150160516 = 8673^2 + 12254^2 .

It is a cyclic number.

It is not a de Polignac number, because 225381445 - 2²¹ = 223284293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225381445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22538140 + ... + 22538149.

It is an arithmetic number, because the mean of its divisors is an integer number (67614435).

Almost surely, 2^225381445 is an apocalyptic number.

It is an amenable number.

225381445 is a deficient number, since it is larger than the sum of its proper divisors (45076295).

225381445 is an equidigital number, since it uses as much as digits as its factorization.

225381445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45076294.

The product of its digits is 38400, while the sum is 34.

The square root of 225381445 is about 15012.7094489969. The cubic root of 225381445 is about 608.5637129971.

The spelling of 225381445 in words is "two hundred twenty-five million, three hundred eighty-one thousand, four hundred forty-five".