225213381 has 12 divisors (see below), whose sum is σ = 326461408. Its totient is φ = 149610024.

The previous prime is 225213379. The next prime is 225213383. The reversal of 225213381 is 183312522.

It is an interprime number because it is at equal distance from previous prime (225213379) and next prime (225213383).

It is not a de Polignac number, because 225213381 - 2¹ = 225213379 is a prime.

It is a super-2 number, since 2×225213381² = 101442133962902322, 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 (225213383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41665 + ... + 46758.

Almost surely, 2^225213381 is an apocalyptic number.

It is an amenable number.

225213381 is a deficient number, since it is larger than the sum of its proper divisors (101248027).

225213381 is a wasteful number, since it uses less digits than its factorization.

225213381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88712 (or 88709 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 225213381 is about 15007.1110144491. Note that the first 3 decimals coincide. The cubic root of 225213381 is about 608.4124093783.

The spelling of 225213381 in words is "two hundred twenty-five million, two hundred thirteen thousand, three hundred eighty-one".