201542660 has 24 divisors (see below), whose sum is σ = 461716416. Its totient is φ = 73288160.

The previous prime is 201542651. The next prime is 201542669. The reversal of 201542660 is 66245102.

It is an interprime number because it is at equal distance from previous prime (201542651) and next prime (201542669).

It is not an unprimeable number, because it can be changed into a prime (201542669) 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, 457832 + ... + 458271.

It is an arithmetic number, because the mean of its divisors is an integer number (19238184).

Almost surely, 2^201542660 is an apocalyptic number.

201542660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201542660 is an abundant number, since it is smaller than the sum of its proper divisors (260173756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201542660 is a wasteful number, since it uses less digits than its factorization.

201542660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916123 (or 916121 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 201542660 is about 14196.5721214665. The cubic root of 201542660 is about 586.3032866490.

Adding to 201542660 its reverse (66245102), we get a palindrome (267787762).

It can be divided in two parts, 201542 and 660, that added together give a palindrome (202202).

The spelling of 201542660 in words is "two hundred one million, five hundred forty-two thousand, six hundred sixty".