71331630 has 16 divisors (see below), whose sum is σ = 171195984. Its totient is φ = 19021760.

The previous prime is 71331613. The next prime is 71331647. The reversal of 71331630 is 3613317.

It is an interprime number because it is at equal distance from previous prime (71331613) and next prime (71331647).

It is a self number, because there is not a number n which added to its sum of digits gives 71331630.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1188831 + ... + 1188890.

It is an arithmetic number, because the mean of its divisors is an integer number (10699749).

Almost surely, 2^71331630 is an apocalyptic number.

71331630 is an abundant number, since it is smaller than the sum of its proper divisors (99864354).

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

71331630 is a wasteful number, since it uses less digits than its factorization.

71331630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2377731.

The product of its (nonzero) digits is 1134, while the sum is 24.

The square root of 71331630 is about 8445.8054678047. The cubic root of 71331630 is about 414.7254777072.

Adding to 71331630 its reverse (3613317), we get a palindrome (74944947).

The spelling of 71331630 in words is "seventy-one million, three hundred thirty-one thousand, six hundred thirty".