81258422 has 8 divisors (see below), whose sum is σ = 139300176. Its totient is φ = 34825032.

The previous prime is 81258389. The next prime is 81258431. The reversal of 81258422 is 22485218.

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

It is a super-2 number, since 2×81258422² = 13205862291860168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2902073 + ... + 2902100.

It is an arithmetic number, because the mean of its divisors is an integer number (17412522).

Almost surely, 2^81258422 is an apocalyptic number.

81258422 is a deficient number, since it is larger than the sum of its proper divisors (58041754).

81258422 is a wasteful number, since it uses less digits than its factorization.

81258422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5804182.

The product of its digits is 10240, while the sum is 32.

The square root of 81258422 is about 9014.3453450597. The cubic root of 81258422 is about 433.1345172114.

The spelling of 81258422 in words is "eighty-one million, two hundred fifty-eight thousand, four hundred twenty-two".