81122654 has 8 divisors (see below), whose sum is σ = 121722480. Its totient is φ = 40548496.

The previous prime is 81122653. The next prime is 81122659. The reversal of 81122654 is 45622118.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81122653) 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, 7682 + ... + 14874.

It is an arithmetic number, because the mean of its divisors is an integer number (15215310).

Almost surely, 2^81122654 is an apocalyptic number.

81122654 is a deficient number, since it is larger than the sum of its proper divisors (40599826).

81122654 is a wasteful number, since it uses less digits than its factorization.

81122654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12834.

The product of its digits is 3840, while the sum is 29.

The square root of 81122654 is about 9006.8115335006. The cubic root of 81122654 is about 432.8931531477.

The spelling of 81122654 in words is "eighty-one million, one hundred twenty-two thousand, six hundred fifty-four".