225990807821 has 8 divisors (see below), whose sum is σ = 226230240384. Its totient is φ = 225751501360.

The previous prime is 225990807799. The next prime is 225990807883. The reversal of 225990807821 is 128708099522.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225990807821 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 (225990807121) 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, 3796736 + ... + 3855798.

It is an arithmetic number, because the mean of its divisors is an integer number (28278780048).

Almost surely, 2^225990807821 is an apocalyptic number.

It is an amenable number.

225990807821 is a deficient number, since it is larger than the sum of its proper divisors (239432563).

225990807821 is a wasteful number, since it uses less digits than its factorization.

225990807821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63051.

The product of its (nonzero) digits is 1451520, while the sum is 53.

The spelling of 225990807821 in words is "two hundred twenty-five billion, nine hundred ninety million, eight hundred seven thousand, eight hundred twenty-one".