81161483 has 8 divisors (see below), whose sum is σ = 92005200. Its totient is φ = 70975008.

The previous prime is 81161477. The next prime is 81161513. The reversal of 81161483 is 38416118.

It is a happy number.

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

It is not a de Polignac number, because 81161483 - 2⁶ = 81161419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81161413) 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, 164048 + ... + 164541.

It is an arithmetic number, because the mean of its divisors is an integer number (11500650).

Almost surely, 2^81161483 is an apocalyptic number.

81161483 is a deficient number, since it is larger than the sum of its proper divisors (10843717).

81161483 is a wasteful number, since it uses less digits than its factorization.

81161483 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328621.

The product of its digits is 4608, while the sum is 32.

The square root of 81161483 is about 9008.9668109057. The cubic root of 81161483 is about 432.9622095962.

The spelling of 81161483 in words is "eighty-one million, one hundred sixty-one thousand, four hundred eighty-three".