201145851 has 6 divisors (see below), whose sum is σ = 290544020. Its totient is φ = 134097228.

The previous prime is 201145823. The next prime is 201145897. The reversal of 201145851 is 158541102.

201145851 is a `hidden beast` number, since 201 + 1 + 458 + 5 + 1 = 666.

201145851 is nontrivially palindromic in base 16.

It is not a de Polignac number, because 201145851 - 2¹⁸ = 200883707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201145811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11174761 + ... + 11174778.

Almost surely, 2^201145851 is an apocalyptic number.

201145851 is a deficient number, since it is larger than the sum of its proper divisors (89398169).

201145851 is a wasteful number, since it uses less digits than its factorization.

201145851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22349545 (or 22349542 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

The square root of 201145851 is about 14182.5897141531. The cubic root of 201145851 is about 585.9182510882.

Adding to 201145851 its reverse (158541102), we get a palindrome (359686953).

The spelling of 201145851 in words is "two hundred one million, one hundred forty-five thousand, eight hundred fifty-one".