201205501 has 4 divisors (see below), whose sum is σ = 229949152. Its totient is φ = 172461852.

The previous prime is 201205483. The next prime is 201205507. The reversal of 201205501 is 105502102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201205501 - 2⁷ = 201205373 is a prime.

It is a super-2 number, since 2×201205501² = 80967307265322002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201205507) 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, 14371815 + ... + 14371828.

It is an arithmetic number, because the mean of its divisors is an integer number (57487288).

Almost surely, 2^201205501 is an apocalyptic number.

It is an amenable number.

201205501 is a deficient number, since it is larger than the sum of its proper divisors (28743651).

201205501 is an equidigital number, since it uses as much as digits as its factorization.

201205501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28743650.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 201205501 is about 14184.6924887359. The cubic root of 201205501 is about 585.9761635752.

Adding to 201205501 its reverse (105502102), we get a palindrome (306707603).

The spelling of 201205501 in words is "two hundred one million, two hundred five thousand, five hundred one".