81732235 has 16 divisors (see below), whose sum is σ = 105910560. Its totient is φ = 60192000.

The previous prime is 81732199. The next prime is 81732239. The reversal of 81732235 is 53223718.

It is not a de Polignac number, because 81732235 - 2¹³ = 81724043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81732197 and 81732206.

It is not an unprimeable number, because it can be changed into a prime (81732239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25735 + ... + 28735.

It is an arithmetic number, because the mean of its divisors is an integer number (6619410).

Almost surely, 2^81732235 is an apocalyptic number.

81732235 is a deficient number, since it is larger than the sum of its proper divisors (24178325).

81732235 is a wasteful number, since it uses less digits than its factorization.

81732235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3438.

The product of its digits is 10080, while the sum is 31.

The square root of 81732235 is about 9040.5881998905. The cubic root of 81732235 is about 433.9747467025.

The spelling of 81732235 in words is "eighty-one million, seven hundred thirty-two thousand, two hundred thirty-five".