201542806 has 8 divisors (see below), whose sum is σ = 309344904. Its totient is φ = 98427840.

The previous prime is 201542797. The next prime is 201542807. The reversal of 201542806 is 608245102.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201542807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1171675 + ... + 1171846.

It is an arithmetic number, because the mean of its divisors is an integer number (38668113).

Almost surely, 2^201542806 is an apocalyptic number.

201542806 is a deficient number, since it is larger than the sum of its proper divisors (107802098).

201542806 is a wasteful number, since it uses less digits than its factorization.

201542806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2343566.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 201542806 is about 14196.5772635519. The cubic root of 201542806 is about 586.3034282241.

Adding to 201542806 its reverse (608245102), we get a palindrome (809787908).

The spelling of 201542806 in words is "two hundred one million, five hundred forty-two thousand, eight hundred six".