81055132 has 6 divisors (see below), whose sum is σ = 141846488. Its totient is φ = 40527564.

The previous prime is 81055127. The next prime is 81055141. The reversal of 81055132 is 23155018.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 81055097 and 81055106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10131888 + ... + 10131895.

Almost surely, 2^81055132 is an apocalyptic number.

It is an amenable number.

81055132 is a deficient number, since it is larger than the sum of its proper divisors (60791356).

81055132 is a wasteful number, since it uses less digits than its factorization.

81055132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20263787 (or 20263785 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 81055132 is about 9003.0623678835. The cubic root of 81055132 is about 432.7730143884.

The spelling of 81055132 in words is "eighty-one million, fifty-five thousand, one hundred thirty-two".