81046145 has 8 divisors (see below), whose sum is σ = 98625600. Its totient is φ = 63923440.

The previous prime is 81046139. The next prime is 81046151. The reversal of 81046145 is 54164018.

It is an interprime number because it is at equal distance from previous prime (81046139) and next prime (81046151).

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

It is not a de Polignac number, because 81046145 - 2¹⁸ = 80784001 is a prime.

It is a super-2 number, since 2×81046145² = 13136955238722050, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113795 + ... + 114504.

It is an arithmetic number, because the mean of its divisors is an integer number (12328200).

Almost surely, 2^81046145 is an apocalyptic number.

It is an amenable number.

81046145 is a deficient number, since it is larger than the sum of its proper divisors (17579455).

81046145 is a wasteful number, since it uses less digits than its factorization.

81046145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228375.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 81046145 is about 9002.5632460983. The cubic root of 81046145 is about 432.7570192061.

The spelling of 81046145 in words is "eighty-one million, forty-six thousand, one hundred forty-five".