225715381 has 8 divisors (see below), whose sum is σ = 233694720. Its totient is φ = 217749168.

The previous prime is 225715379. The next prime is 225715387. The reversal of 225715381 is 183517522.

225715381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 225715381 - 2¹ = 225715379 is a prime.

It is a super-2 number, since 2×225715381² = 101894866439950322, 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 (225715387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42960 + ... + 47926.

It is an arithmetic number, because the mean of its divisors is an integer number (29211840).

Almost surely, 2^225715381 is an apocalyptic number.

It is an amenable number.

225715381 is a deficient number, since it is larger than the sum of its proper divisors (7979339).

225715381 is a wasteful number, since it uses less digits than its factorization.

225715381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6563.

The product of its digits is 16800, while the sum is 34.

The square root of 225715381 is about 15023.8271089626. The cubic root of 225715381 is about 608.8641237772.

The spelling of 225715381 in words is "two hundred twenty-five million, seven hundred fifteen thousand, three hundred eighty-one".