81232601 has 2 divisors, whose sum is σ = 81232602. Its totient is φ = 81232600.

The previous prime is 81232549. The next prime is 81232607. The reversal of 81232601 is 10623218.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78783376 + 2449225 = 8876^2 + 1565^2 .

It is a cyclic number.

It is not a de Polignac number, because 81232601 - 2⁶ = 81232537 is a prime.

It is not a weakly prime, because it can be changed into another prime (81232607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40616300 + 40616301.

It is an arithmetic number, because the mean of its divisors is an integer number (40616301).

Almost surely, 2^81232601 is an apocalyptic number.

It is an amenable number.

81232601 is a deficient number, since it is larger than the sum of its proper divisors (1).

81232601 is an equidigital number, since it uses as much as digits as its factorization.

81232601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 81232601 is about 9012.9130141148. The cubic root of 81232601 is about 433.0886341676.

Adding to 81232601 its reverse (10623218), we get a palindrome (91855819).

The spelling of 81232601 in words is "eighty-one million, two hundred thirty-two thousand, six hundred one".