202161539 has 8 divisors (see below), whose sum is σ = 212970000. Its totient is φ = 191369952.

The previous prime is 202161527. The next prime is 202161541. The reversal of 202161539 is 935161202.

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 202161539 - 2¹² = 202157443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202161139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25997 + ... + 32865.

It is an arithmetic number, because the mean of its divisors is an integer number (26621250).

Almost surely, 2^202161539 is an apocalyptic number.

202161539 is a deficient number, since it is larger than the sum of its proper divisors (10808461).

202161539 is a wasteful number, since it uses less digits than its factorization.

202161539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8437.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 202161539 is about 14218.3521900395. The cubic root of 202161539 is about 586.9027958230.

The spelling of 202161539 in words is "two hundred two million, one hundred sixty-one thousand, five hundred thirty-nine".