201545445 has 16 divisors (see below), whose sum is σ = 339445440. Its totient is φ = 101833344.

The previous prime is 201545441. The next prime is 201545471. The reversal of 201545445 is 544545102.

It is not a de Polignac number, because 201545445 - 2² = 201545441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201545441) 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 15 ways as a sum of consecutive naturals, for example, 353304 + ... + 353873.

It is an arithmetic number, because the mean of its divisors is an integer number (21215340).

Almost surely, 2^201545445 is an apocalyptic number.

It is an amenable number.

201545445 is a deficient number, since it is larger than the sum of its proper divisors (137899995).

201545445 is a wasteful number, since it uses less digits than its factorization.

201545445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707204.

The product of its (nonzero) digits is 16000, while the sum is 30.

The square root of 201545445 is about 14196.6702081861. The cubic root of 201545445 is about 586.3059872305.

The spelling of 201545445 in words is "two hundred one million, five hundred forty-five thousand, four hundred forty-five".