71103312 has 120 divisors (see below), whose sum is σ = 237484800. Its totient is φ = 20309184.

The previous prime is 71103311. The next prime is 71103313. The reversal of 71103312 is 21330117.

It is an interprime number because it is at equal distance from previous prime (71103311) and next prime (71103313).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71103311) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 19489 + ... + 22847.

It is an arithmetic number, because the mean of its divisors is an integer number (1979040).

Almost surely, 2^71103312 is an apocalyptic number.

71103312 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71103312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118742400).

71103312 is an abundant number, since it is smaller than the sum of its proper divisors (166381488).

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

71103312 is a wasteful number, since it uses less digits than its factorization.

71103312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3390 (or 3371 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 18.

The square root of 71103312 is about 8432.2779840325. The cubic root of 71103312 is about 414.2825208745.

Adding to 71103312 its reverse (21330117), we get a palindrome (92433429).

The spelling of 71103312 in words is "seventy-one million, one hundred three thousand, three hundred twelve".