201545501 has 4 divisors (see below), whose sum is σ = 201590400. Its totient is φ = 201500604.

The previous prime is 201545471. The next prime is 201545503. The reversal of 201545501 is 105545102.

It is a happy number.

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 201545501 - 2¹⁰ = 201544477 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 (201545503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14861 + ... + 24978.

It is an arithmetic number, because the mean of its divisors is an integer number (50397600).

Almost surely, 2^201545501 is an apocalyptic number.

It is an amenable number.

201545501 is a deficient number, since it is larger than the sum of its proper divisors (44899).

201545501 is an equidigital number, since it uses as much as digits as its factorization.

201545501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44898.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 201545501 is about 14196.6721804795. The cubic root of 201545501 is about 586.3060415328.

The spelling of 201545501 in words is "two hundred one million, five hundred forty-five thousand, five hundred one".