81525334 has 16 divisors (see below), whose sum is σ = 136509120. Its totient is φ = 36194760.

The previous prime is 81525331. The next prime is 81525347. The reversal of 81525334 is 43352518.

It is a junction number, because it is equal to n+sod(n) for n = 81525296 and 81525305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81525331) 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, 42144 + ... + 44035.

It is an arithmetic number, because the mean of its divisors is an integer number (8531820).

Almost surely, 2^81525334 is an apocalyptic number.

81525334 is a deficient number, since it is larger than the sum of its proper divisors (54983786).

81525334 is a wasteful number, since it uses less digits than its factorization.

81525334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86235.

The product of its digits is 14400, while the sum is 31.

The square root of 81525334 is about 9029.1380541002. The cubic root of 81525334 is about 433.6082422590.

The spelling of 81525334 in words is "eighty-one million, five hundred twenty-five thousand, three hundred thirty-four".