225821816701338 has 64 divisors (see below), whose sum is σ = 530686054184832. Its totient is φ = 63156972257280.

The previous prime is 225821816701309. The next prime is 225821816701343. The reversal of 225821816701338 is 833107618128522.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15329431 + ... + 26203722.

It is an arithmetic number, because the mean of its divisors is an integer number (8291969596638).

Almost surely, 2^{225821816701338} is an apocalyptic number.

225821816701338 is an abundant number, since it is smaller than the sum of its proper divisors (304864237483494).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225821816701338 is a wasteful number, since it uses less digits than its factorization.

225821816701338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41539519.

The product of its (nonzero) digits is 7741440, while the sum is 57.

The spelling of 225821816701338 in words is "two hundred twenty-five trillion, eight hundred twenty-one billion, eight hundred sixteen million, seven hundred one thousand, three hundred thirty-eight".