243314606252021 has 4 divisors (see below), whose sum is σ = 243385896793452. Its totient is φ = 243243315710592.

The previous prime is 243314606251999. The next prime is 243314606252089. The reversal of 243314606252021 is 120252606413342.

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 184414906203025 + 58899700048996 = 13579945^2 + 7674614^2 .

It is a cyclic number.

It is not a de Polignac number, because 243314606252021 - 2³⁴ = 243297426382837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243314606252021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243314606272021) 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, 35645265596 + ... + 35645272421.

It is an arithmetic number, because the mean of its divisors is an integer number (60846474198363).

Almost surely, 2^{243314606252021} is an apocalyptic number.

It is an amenable number.

243314606252021 is a deficient number, since it is larger than the sum of its proper divisors (71290541431).

243314606252021 is an equidigital number, since it uses as much as digits as its factorization.

243314606252021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71290541430.

The product of its (nonzero) digits is 414720, while the sum is 41.

The spelling of 243314606252021 in words is "two hundred forty-three trillion, three hundred fourteen billion, six hundred six million, two hundred fifty-two thousand, twenty-one".