81422195 has 4 divisors (see below), whose sum is σ = 97706640. Its totient is φ = 65137752.

The previous prime is 81422191. The next prime is 81422207. The reversal of 81422195 is 59122418.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 59122418 = 2 ⋅29561209.

It is a cyclic number.

It is not a de Polignac number, because 81422195 - 2² = 81422191 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81422191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8142215 + ... + 8142224.

It is an arithmetic number, because the mean of its divisors is an integer number (24426660).

Almost surely, 2^81422195 is an apocalyptic number.

81422195 is a deficient number, since it is larger than the sum of its proper divisors (16284445).

81422195 is a wasteful number, since it uses less digits than its factorization.

81422195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16284444.

The product of its digits is 5760, while the sum is 32.

The square root of 81422195 is about 9023.4247932811. The cubic root of 81422195 is about 433.4253101934.

The spelling of 81422195 in words is "eighty-one million, four hundred twenty-two thousand, one hundred ninety-five".