81228043 has 8 divisors (see below), whose sum is σ = 90493200. Its totient is φ = 72393888.

The previous prime is 81228041. The next prime is 81228071. The reversal of 81228043 is 34082218.

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

It is a cyclic number.

It is not a de Polignac number, because 81228043 - 2¹ = 81228041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81228041) 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, 107353 + ... + 108106.

It is an arithmetic number, because the mean of its divisors is an integer number (11311650).

Almost surely, 2^81228043 is an apocalyptic number.

81228043 is a deficient number, since it is larger than the sum of its proper divisors (9265157).

81228043 is a wasteful number, since it uses less digits than its factorization.

81228043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215501.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 81228043 is about 9012.6601511429. The cubic root of 81228043 is about 433.0805337461.

The spelling of 81228043 in words is "eighty-one million, two hundred twenty-eight thousand, forty-three".