81827433 has 12 divisors (see below), whose sum is σ = 124416240. Its totient is φ = 51680376.

The previous prime is 81827393. The next prime is 81827441. The reversal of 81827433 is 33472818.

It is not a de Polignac number, because 81827433 - 2¹² = 81823337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81827483) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 239091 + ... + 239432.

It is an arithmetic number, because the mean of its divisors is an integer number (10368020).

Almost surely, 2^81827433 is an apocalyptic number.

It is an amenable number.

81827433 is a deficient number, since it is larger than the sum of its proper divisors (42588807).

81827433 is a wasteful number, since it uses less digits than its factorization.

81827433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478548 (or 478545 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 81827433 is about 9045.8517011943. The cubic root of 81827433 is about 434.1431726945.

The spelling of 81827433 in words is "eighty-one million, eight hundred twenty-seven thousand, four hundred thirty-three".