81422455 has 8 divisors (see below), whose sum is σ = 98604000. Its totient is φ = 64539936.

The previous prime is 81422449. The next prime is 81422491. The reversal of 81422455 is 55422418.

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 81422455 - 2⁵ = 81422423 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74155 + ... + 75244.

It is an arithmetic number, because the mean of its divisors is an integer number (12325500).

Almost surely, 2^81422455 is an apocalyptic number.

81422455 is a deficient number, since it is larger than the sum of its proper divisors (17181545).

81422455 is a wasteful number, since it uses less digits than its factorization.

81422455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149513.

The product of its digits is 12800, while the sum is 31.

The square root of 81422455 is about 9023.4392002163. The cubic root of 81422455 is about 433.4257715355.

The spelling of 81422455 in words is "eighty-one million, four hundred twenty-two thousand, four hundred fifty-five".