81527002 has 8 divisors (see below), whose sum is σ = 129484116. Its totient is φ = 38365632.

The previous prime is 81526997. The next prime is 81527003. The reversal of 81527002 is 20072518.

It can be written as a sum of positive squares in 2 ways, for example, as 80084601 + 1442401 = 8949^2 + 1201^2 .

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

It is not an unprimeable number, because it can be changed into a prime (81527003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1198893 + ... + 1198960.

Almost surely, 2^81527002 is an apocalyptic number.

81527002 is a deficient number, since it is larger than the sum of its proper divisors (47957114).

81527002 is a wasteful number, since it uses less digits than its factorization.

81527002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2397872.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 81527002 is about 9029.2304212485. The cubic root of 81527002 is about 433.6111994323.

The spelling of 81527002 in words is "eighty-one million, five hundred twenty-seven thousand, two".