71215830 has 48 divisors (see below), whose sum is σ = 211614624. Its totient is φ = 16277760.

The previous prime is 71215829. The next prime is 71215831. The reversal of 71215830 is 3851217.

It is an interprime number because it is at equal distance from previous prime (71215829) and next prime (71215831).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 71215794 and 71215803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71215831) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55891 + ... + 57150.

It is an arithmetic number, because the mean of its divisors is an integer number (4408638).

Almost surely, 2^71215830 is an apocalyptic number.

71215830 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

71215830 is an abundant number, since it is smaller than the sum of its proper divisors (140398794).

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

71215830 is a wasteful number, since it uses less digits than its factorization.

71215830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113061 (or 113058 counting only the distinct ones).

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

The square root of 71215830 is about 8438.9472092199. The cubic root of 71215830 is about 414.5009339255.

The spelling of 71215830 in words is "seventy-one million, two hundred fifteen thousand, eight hundred thirty".