81422970 has 16 divisors (see below), whose sum is σ = 195415200. Its totient is φ = 21712784.

The previous prime is 81422963. The next prime is 81422989. The reversal of 81422970 is 7922418.

It is a happy 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, 1357020 + ... + 1357079.

It is an arithmetic number, because the mean of its divisors is an integer number (12213450).

Almost surely, 2^81422970 is an apocalyptic number.

81422970 is an abundant number, since it is smaller than the sum of its proper divisors (113992230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81422970 is a wasteful number, since it uses less digits than its factorization.

81422970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2714109.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 81422970 is about 9023.4677369623. The cubic root of 81422970 is about 433.4266853449.

The spelling of 81422970 in words is "eighty-one million, four hundred twenty-two thousand, nine hundred seventy".