81410451 has 8 divisors (see below), whose sum is σ = 109666704. Its totient is φ = 53713920.

The previous prime is 81410431. The next prime is 81410473. The reversal of 81410451 is 15401418.

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

It is not a de Polignac number, because 81410451 - 2¹¹ = 81408403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81410411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139590 + ... + 140171.

It is an arithmetic number, because the mean of its divisors is an integer number (13708338).

Almost surely, 2^81410451 is an apocalyptic number.

81410451 is a deficient number, since it is larger than the sum of its proper divisors (28256253).

81410451 is a wasteful number, since it uses less digits than its factorization.

81410451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279861.

The product of its (nonzero) digits is 640, while the sum is 24.

The square root of 81410451 is about 9022.7740191141. The cubic root of 81410451 is about 433.4044707012.

Adding to 81410451 its reverse (15401418), we get a palindrome (96811869).

The spelling of 81410451 in words is "eighty-one million, four hundred ten thousand, four hundred fifty-one".