900245221 has 4 divisors (see below), whose sum is σ = 906816492. Its totient is φ = 893673952.

The previous prime is 900245207. The next prime is 900245233. The reversal of 900245221 is 122542009.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122542009 = 347 ⋅353147.

It can be written as a sum of positive squares in 2 ways, for example, as 195608196 + 704637025 = 13986^2 + 26545^2 .

It is a cyclic number.

It is not a de Polignac number, because 900245221 - 2²³ = 891856613 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 (900240221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3285430 + ... + 3285703.

It is an arithmetic number, because the mean of its divisors is an integer number (226704123).

Almost surely, 2^900245221 is an apocalyptic number.

It is an amenable number.

900245221 is a deficient number, since it is larger than the sum of its proper divisors (6571271).

900245221 is a wasteful number, since it uses less digits than its factorization.

900245221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6571270.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 900245221 is about 30004.0867383095. The cubic root of 900245221 is about 965.5770648918.

The spelling of 900245221 in words is "nine hundred million, two hundred forty-five thousand, two hundred twenty-one".