225237861 has 8 divisors (see below), whose sum is σ = 333685760. Its totient is φ = 150158556.

The previous prime is 225237851. The next prime is 225237871. The reversal of 225237861 is 168732522.

225237861 is a `hidden beast` number, since 2 + 2 + 523 + 78 + 61 = 666.

It is an interprime number because it is at equal distance from previous prime (225237851) and next prime (225237871).

It is not a de Polignac number, because 225237861 - 2⁵ = 225237829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225237821) 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 7 ways as a sum of consecutive naturals, for example, 4171045 + ... + 4171098.

It is an arithmetic number, because the mean of its divisors is an integer number (41710720).

Almost surely, 2^225237861 is an apocalyptic number.

It is an amenable number.

225237861 is a deficient number, since it is larger than the sum of its proper divisors (108447899).

225237861 is an equidigital number, since it uses as much as digits as its factorization.

225237861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8342152 (or 8342146 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 225237861 is about 15007.9266056308. The cubic root of 225237861 is about 608.4344527638.

The spelling of 225237861 in words is "two hundred twenty-five million, two hundred thirty-seven thousand, eight hundred sixty-one".