82150540 has 12 divisors (see below), whose sum is σ = 172516176. Its totient is φ = 32860208.

The previous prime is 82150517. The next prime is 82150573. The reversal of 82150540 is 4505128.

It is a super-2 number, since 2×82150540² = 13497422444583200, which contains 22 as substring.

It is an unprimeable number.

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, 2053744 + ... + 2053783.

It is an arithmetic number, because the mean of its divisors is an integer number (14376348).

Almost surely, 2^82150540 is an apocalyptic number.

It is an amenable number.

82150540 is an abundant number, since it is smaller than the sum of its proper divisors (90365636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82150540 is a wasteful number, since it uses less digits than its factorization.

82150540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4107536 (or 4107534 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 82150540 is about 9063.6935076160. The cubic root of 82150540 is about 434.7138471229.

Adding to 82150540 its reverse (4505128), we get a palindrome (86655668).

The spelling of 82150540 in words is "eighty-two million, one hundred fifty thousand, five hundred forty".