201542645 has 8 divisors (see below), whose sum is σ = 242279640. Its totient is φ = 160948480.

The previous prime is 201542639. The next prime is 201542647. The reversal of 201542645 is 546245102.

201542645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3352561 + 198190084 = 1831^2 + 14078^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 201542645 - 2⁶ = 201542581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201542647) 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, 32576 + ... + 38265.

It is an arithmetic number, because the mean of its divisors is an integer number (30284955).

Almost surely, 2^201542645 is an apocalyptic number.

It is an amenable number.

201542645 is a deficient number, since it is larger than the sum of its proper divisors (40736995).

201542645 is an equidigital number, since it uses as much as digits as its factorization.

201542645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71415.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 201542645 is about 14196.5715931700. The cubic root of 201542645 is about 586.3032721036.

Adding to 201542645 its reverse (546245102), we get a palindrome (747787747).

The spelling of 201542645 in words is "two hundred one million, five hundred forty-two thousand, six hundred forty-five".