201436591 has 4 divisors (see below), whose sum is σ = 201609784. Its totient is φ = 201263400.

The previous prime is 201436583. The next prime is 201436619. The reversal of 201436591 is 195634102.

201436591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 201436591 - 2³ = 201436583 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 (201436511) 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, 84840 + ... + 87181.

It is an arithmetic number, because the mean of its divisors is an integer number (50402446).

Almost surely, 2^201436591 is an apocalyptic number.

201436591 is a deficient number, since it is larger than the sum of its proper divisors (173193).

201436591 is a wasteful number, since it uses less digits than its factorization.

201436591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173192.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 201436591 is about 14192.8359040750. The cubic root of 201436591 is about 586.2004142742.

The spelling of 201436591 in words is "two hundred one million, four hundred thirty-six thousand, five hundred ninety-one".