81132601 has 8 divisors (see below), whose sum is σ = 90900864. Its totient is φ = 71763120.

The previous prime is 81132589. The next prime is 81132631. The reversal of 81132601 is 10623118.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81132601 - 2¹⁵ = 81099833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81132631) 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, 99265 + ... + 100078.

It is an arithmetic number, because the mean of its divisors is an integer number (11362608).

Almost surely, 2^81132601 is an apocalyptic number.

It is an amenable number.

81132601 is a deficient number, since it is larger than the sum of its proper divisors (9768263).

81132601 is a wasteful number, since it uses less digits than its factorization.

81132601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199391.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 81132601 is about 9007.3637097655. The cubic root of 81132601 is about 432.9108457485.

Adding to 81132601 its reverse (10623118), we get a palindrome (91755719).

The spelling of 81132601 in words is "eighty-one million, one hundred thirty-two thousand, six hundred one".