201621353452 has 12 divisors (see below), whose sum is σ = 352928403520. Its totient is φ = 100784666736.

The previous prime is 201621353393. The next prime is 201621353491. The reversal of 201621353452 is 254353126102.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6485052 + ... + 6516067.

Almost surely, 2^201621353452 is an apocalyptic number.

It is an amenable number.

201621353452 is a deficient number, since it is larger than the sum of its proper divisors (151307050068).

201621353452 is a wasteful number, since it uses less digits than its factorization.

201621353452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13005000 (or 13004998 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

Adding to 201621353452 its reverse (254353126102), we get a palindrome (455974479554).

The spelling of 201621353452 in words is "two hundred one billion, six hundred twenty-one million, three hundred fifty-three thousand, four hundred fifty-two".