201541145 has 8 divisors (see below), whose sum is σ = 260453256. Its totient is φ = 148830336.

The previous prime is 201541141. The next prime is 201541169. The reversal of 201541145 is 541145102.

It can be written as a sum of positive squares in 4 ways, for example, as 22543504 + 178997641 = 4748^2 + 13379^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 201541145 - 2² = 201541141 is a prime.

It is a super-2 number, since 2×201541145² = 81237666255822050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201541145.

It is not an unprimeable number, because it can be changed into a prime (201541141) 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, 1550252 + ... + 1550381.

It is an arithmetic number, because the mean of its divisors is an integer number (32556657).

Almost surely, 2^201541145 is an apocalyptic number.

It is an amenable number.

201541145 is a deficient number, since it is larger than the sum of its proper divisors (58912111).

201541145 is a wasteful number, since it uses less digits than its factorization.

201541145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3100651.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 201541145 is about 14196.5187634152. The cubic root of 201541145 is about 586.3018175610.

Adding to 201541145 its reverse (541145102), we get a palindrome (742686247).

The spelling of 201541145 in words is "two hundred one million, five hundred forty-one thousand, one hundred forty-five".