201802541 has 4 divisors (see below), whose sum is σ = 201940284. Its totient is φ = 201664800.

The previous prime is 201802493. The next prime is 201802543. The reversal of 201802541 is 145208102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 162690025 + 39112516 = 12755^2 + 6254^2 .

It is a cyclic number.

It is not a de Polignac number, because 201802541 - 2¹⁴ = 201786157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201802543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66650 + ... + 69611.

It is an arithmetic number, because the mean of its divisors is an integer number (50485071).

Almost surely, 2^201802541 is an apocalyptic number.

It is an amenable number.

201802541 is a deficient number, since it is larger than the sum of its proper divisors (137743).

201802541 is a wasteful number, since it uses less digits than its factorization.

201802541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137742.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 201802541 is about 14205.7221217367. The cubic root of 201802541 is about 586.5551830963. Note that the first 3 decimals are identical.

The spelling of 201802541 in words is "two hundred one million, eight hundred two thousand, five hundred forty-one".