81454331 has 8 divisors (see below), whose sum is σ = 95361504. Its totient is φ = 68114880.

The previous prime is 81454319. The next prime is 81454333. The reversal of 81454331 is 13345418.

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

It is a cyclic number.

It is not a de Polignac number, because 81454331 - 2¹⁴ = 81437947 is a prime.

It is a super-2 number, since 2×81454331² = 13269616077315122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 81454294 and 81454303.

It is not an unprimeable number, because it can be changed into a prime (81454333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141620 + ... + 142193.

It is an arithmetic number, because the mean of its divisors is an integer number (11920188).

Almost surely, 2^81454331 is an apocalyptic number.

81454331 is a deficient number, since it is larger than the sum of its proper divisors (13907173).

81454331 is a wasteful number, since it uses less digits than its factorization.

81454331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283861.

The product of its digits is 5760, while the sum is 29.

The square root of 81454331 is about 9025.2053162241. The cubic root of 81454331 is about 433.4823246382.

Adding to 81454331 its reverse (13345418), we get a palindrome (94799749).

The spelling of 81454331 in words is "eighty-one million, four hundred fifty-four thousand, three hundred thirty-one".