81454214 has 24 divisors (see below), whose sum is σ = 128350560. Its totient is φ = 38761632.

The previous prime is 81454207. The next prime is 81454231. The reversal of 81454214 is 41245418.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132572 + ... + 133184.

It is an arithmetic number, because the mean of its divisors is an integer number (5347940).

Almost surely, 2^81454214 is an apocalyptic number.

81454214 is a deficient number, since it is larger than the sum of its proper divisors (46896346).

81454214 is a wasteful number, since it uses less digits than its factorization.

81454214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752 (or 723 counting only the distinct ones).

The product of its digits is 5120, while the sum is 29.

The square root of 81454214 is about 9025.1988343748. The cubic root of 81454214 is about 433.4821170885.

The spelling of 81454214 in words is "eighty-one million, four hundred fifty-four thousand, two hundred fourteen".