203452452521 has 8 divisors (see below), whose sum is σ = 208957407624. Its totient is φ = 197947825920.

The previous prime is 203452452479. The next prime is 203452452547. The reversal of 203452452521 is 125254254302.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 40587743296 + 162864709225 = 201464^2 + 403565^2 .

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-203452452521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203452452221) 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, 1674881 + ... + 1792241.

It is an arithmetic number, because the mean of its divisors is an integer number (26119675953).

Almost surely, 2^203452452521 is an apocalyptic number.

It is an amenable number.

203452452521 is a deficient number, since it is larger than the sum of its proper divisors (5504955103).

203452452521 is a wasteful number, since it uses less digits than its factorization.

203452452521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164251.

The product of its (nonzero) digits is 96000, while the sum is 35.

The spelling of 203452452521 in words is "two hundred three billion, four hundred fifty-two million, four hundred fifty-two thousand, five hundred twenty-one".