81588201 has 4 divisors (see below), whose sum is σ = 108784272. Its totient is φ = 54392132.

The previous prime is 81588197. The next prime is 81588203. The reversal of 81588201 is 10288518.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 81588201 - 2² = 81588197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81588203) 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, 13598031 + ... + 13598036.

It is an arithmetic number, because the mean of its divisors is an integer number (27196068).

Almost surely, 2^81588201 is an apocalyptic number.

It is an amenable number.

81588201 is a deficient number, since it is larger than the sum of its proper divisors (27196071).

81588201 is a wasteful number, since it uses less digits than its factorization.

81588201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27196070.

The product of its (nonzero) digits is 5120, while the sum is 33.

The square root of 81588201 is about 9032.6187232718. The cubic root of 81588201 is about 433.7196703844.

The spelling of 81588201 in words is "eighty-one million, five hundred eighty-eight thousand, two hundred one".