81196330 has 8 divisors (see below), whose sum is σ = 146153412. Its totient is φ = 32478528.

The previous prime is 81196319. The next prime is 81196337. The reversal of 81196330 is 3369118.

It can be written as a sum of positive squares in 2 ways, for example, as 80299521 + 896809 = 8961^2 + 947^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 81196292 and 81196301.

It is not an unprimeable number, because it can be changed into a prime (81196337) 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, 4059807 + ... + 4059826.

Almost surely, 2^81196330 is an apocalyptic number.

81196330 is a deficient number, since it is larger than the sum of its proper divisors (64957082).

81196330 is a wasteful number, since it uses less digits than its factorization.

81196330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8119640.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 81196330 is about 9010.9006209146. The cubic root of 81196330 is about 433.0241654024.

Adding to 81196330 its product of nonzero digits (3888), we get a palindrome (81200218).

The spelling of 81196330 in words is "eighty-one million, one hundred ninety-six thousand, three hundred thirty".