252000106621 has 4 divisors (see below), whose sum is σ = 260689765500. Its totient is φ = 243310447744.

The previous prime is 252000106609. The next prime is 252000106627. The reversal of 252000106621 is 126601000252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 115923225625 + 136076880996 = 340475^2 + 368886^2 .

It is a cyclic number.

It is not a de Polignac number, because 252000106621 - 2¹³ = 252000098429 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 (252000106627) 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, 4344829396 + ... + 4344829453.

It is an arithmetic number, because the mean of its divisors is an integer number (65172441375).

Almost surely, 2^252000106621 is an apocalyptic number.

It is an amenable number.

252000106621 is a deficient number, since it is larger than the sum of its proper divisors (8689658879).

252000106621 is an equidigital number, since it uses as much as digits as its factorization.

252000106621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8689658878.

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

Adding to 252000106621 its reverse (126601000252), we get a palindrome (378601106873).

The spelling of 252000106621 in words is "two hundred fifty-two billion, one hundred six thousand, six hundred twenty-one".