201541680 has 60 divisors (see below), whose sum is σ = 676846560. Its totient is φ = 53744256.

The previous prime is 201541667. The next prime is 201541693. The reversal of 201541680 is 86145102.

It is an interprime number because it is at equal distance from previous prime (201541667) and next prime (201541693).

It is a tau number, because it is divible by the number of its divisors (60).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 139240 + ... + 140679.

It is an arithmetic number, because the mean of its divisors is an integer number (11280776).

Almost surely, 2^201541680 is an apocalyptic number.

201541680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201541680 is an abundant number, since it is smaller than the sum of its proper divisors (475304880).

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

201541680 is a wasteful number, since it uses less digits than its factorization.

201541680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279938 (or 279929 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 201541680 is about 14196.5376060503. The cubic root of 201541680 is about 586.3023363487.

Adding to 201541680 its reverse (86145102), we get a palindrome (287686782).

The spelling of 201541680 in words is "two hundred one million, five hundred forty-one thousand, six hundred eighty".