201244621 has 8 divisors (see below), whose sum is σ = 204054264. Its totient is φ = 198451200.

The previous prime is 201244609. The next prime is 201244633. The reversal of 201244621 is 126442102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (201244609) and next prime (201244633).

It can be written as a sum of positive squares in 4 ways, for example, as 193599396 + 7645225 = 13914^2 + 2765^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 201244621 - 2⁷ = 201244493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201244592 and 201244601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201244321) 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, 22081 + ... + 29833.

It is an arithmetic number, because the mean of its divisors is an integer number (25506783).

Almost surely, 2^201244621 is an apocalyptic number.

It is an amenable number.

201244621 is a deficient number, since it is larger than the sum of its proper divisors (2809643).

201244621 is a wasteful number, since it uses less digits than its factorization.

201244621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8111.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 201244621 is about 14186.0713730053. The cubic root of 201244621 is about 586.0141378550.

Adding to 201244621 its reverse (126442102), we get a palindrome (327686723).

The spelling of 201244621 in words is "two hundred one million, two hundred forty-four thousand, six hundred twenty-one".