81342254 has 24 divisors (see below), whose sum is σ = 142757640. Its totient is φ = 34658736.

The previous prime is 81342253. The next prime is 81342277. The reversal of 81342254 is 45224318.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81342253) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15224 + ... + 19860.

It is an arithmetic number, because the mean of its divisors is an integer number (5948235).

Almost surely, 2^81342254 is an apocalyptic number.

81342254 is a deficient number, since it is larger than the sum of its proper divisors (61415386).

81342254 is a wasteful number, since it uses less digits than its factorization.

81342254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4832 (or 4825 counting only the distinct ones).

The product of its digits is 7680, while the sum is 29.

The square root of 81342254 is about 9018.9940680766. The cubic root of 81342254 is about 433.2834168670.

The spelling of 81342254 in words is "eighty-one million, three hundred forty-two thousand, two hundred fifty-four".