71815230 has 24 divisors (see below), whose sum is σ = 186719832. Its totient is φ = 19150704.

The previous prime is 71815207. The next prime is 71815243. The reversal of 71815230 is 3251817.

It is a junction number, because it is equal to n+sod(n) for n = 71815194 and 71815203.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 398884 + ... + 399063.

It is an arithmetic number, because the mean of its divisors is an integer number (7779993).

Almost surely, 2^71815230 is an apocalyptic number.

71815230 is an abundant number, since it is smaller than the sum of its proper divisors (114904602).

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

71815230 is a wasteful number, since it uses less digits than its factorization.

71815230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797960 (or 797957 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 71815230 is about 8474.3867034730. The cubic root of 71815230 is about 415.6605920864.

The spelling of 71815230 in words is "seventy-one million, eight hundred fifteen thousand, two hundred thirty".