201243534 has 16 divisors (see below), whose sum is σ = 403864272. Its totient is φ = 66851648.

The previous prime is 201243533. The next prime is 201243541. The reversal of 201243534 is 435342102.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201243533) 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, 55479 + ... + 58994.

It is an arithmetic number, because the mean of its divisors is an integer number (25241517).

Almost surely, 2^201243534 is an apocalyptic number.

201243534 is an abundant number, since it is smaller than the sum of its proper divisors (202620738).

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

201243534 is a wasteful number, since it uses less digits than its factorization.

201243534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114771.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 201243534 is about 14186.0330607256. The cubic root of 201243534 is about 586.0130827568.

Adding to 201243534 its reverse (435342102), we get a palindrome (636585636).

The spelling of 201243534 in words is "two hundred one million, two hundred forty-three thousand, five hundred thirty-four".