81414345 has 32 divisors (see below), whose sum is σ = 133200000. Its totient is φ = 42453504.

The previous prime is 81414341. The next prime is 81414349. The reversal of 81414345 is 54341418.

It is an interprime number because it is at equal distance from previous prime (81414341) and next prime (81414349).

It is not a de Polignac number, because 81414345 - 2² = 81414341 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (81414341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 162906 + ... + 163404.

It is an arithmetic number, because the mean of its divisors is an integer number (4162500).

Almost surely, 2^81414345 is an apocalyptic number.

It is an amenable number.

81414345 is a deficient number, since it is larger than the sum of its proper divisors (51785655).

81414345 is a wasteful number, since it uses less digits than its factorization.

81414345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729.

The product of its digits is 7680, while the sum is 30.

The square root of 81414345 is about 9022.9898038289. The cubic root of 81414345 is about 433.4113807481.

The spelling of 81414345 in words is "eighty-one million, four hundred fourteen thousand, three hundred forty-five".