68515530 has 16 divisors (see below), whose sum is σ = 164437344. Its totient is φ = 18270800.

The previous prime is 68515523. The next prime is 68515589. The reversal of 68515530 is 3551586.

It is a junction number, because it is equal to n+sod(n) for n = 68515491 and 68515500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1141896 + ... + 1141955.

It is an arithmetic number, because the mean of its divisors is an integer number (10277334).

Almost surely, 2^68515530 is an apocalyptic number.

68515530 is an abundant number, since it is smaller than the sum of its proper divisors (95921814).

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

68515530 is a wasteful number, since it uses less digits than its factorization.

68515530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2283861.

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 68515530 is about 8277.4108270642. The cubic root of 68515530 is about 409.1943927207.

The spelling of 68515530 in words is "sixty-eight million, five hundred fifteen thousand, five hundred thirty".