81327452 has 12 divisors (see below), whose sum is σ = 142691640. Its totient is φ = 40558416.

The previous prime is 81327401. The next prime is 81327469. The reversal of 81327452 is 25472318.

It is a super-2 number, since 2×81327452² = 13228308897624608, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24578 + ... + 27689.

It is an arithmetic number, because the mean of its divisors is an integer number (11890970).

Almost surely, 2^81327452 is an apocalyptic number.

It is an amenable number.

81327452 is a deficient number, since it is larger than the sum of its proper divisors (61364188).

81327452 is a wasteful number, since it uses less digits than its factorization.

81327452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52660 (or 52658 counting only the distinct ones).

The product of its digits is 13440, while the sum is 32.

The square root of 81327452 is about 9018.1734292483. The cubic root of 81327452 is about 433.2571334784.

The spelling of 81327452 in words is "eighty-one million, three hundred twenty-seven thousand, four hundred fifty-two".