81226255342 has 4 divisors (see below), whose sum is σ = 121839383016. Its totient is φ = 40613127670.

The previous prime is 81226255333. The next prime is 81226255361. The reversal of 81226255342 is 24355262218.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 81226255295 and 81226255304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20306563834 + ... + 20306563837.

It is an arithmetic number, because the mean of its divisors is an integer number (30459845754).

Almost surely, 2^81226255342 is an apocalyptic number.

81226255342 is a deficient number, since it is larger than the sum of its proper divisors (40613127674).

81226255342 is a wasteful number, since it uses less digits than its factorization.

81226255342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40613127673.

The product of its digits is 230400, while the sum is 40.

The spelling of 81226255342 in words is "eighty-one billion, two hundred twenty-six million, two hundred fifty-five thousand, three hundred forty-two".