103191312 has 80 divisors (see below), whose sum is σ = 314519552. Its totient is φ = 28529280.

The previous prime is 103191289. The next prime is 103191331. The reversal of 103191312 is 213191301.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5463 + ... + 15369.

Almost surely, 2^103191312 is an apocalyptic number.

103191312 is a gapful number since it is divisible by the number (12) 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 103191312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157259776).

103191312 is an abundant number, since it is smaller than the sum of its proper divisors (211328240).

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

103191312 is a wasteful number, since it uses less digits than its factorization.

103191312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9956 (or 9950 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 103191312 is about 10158.3124582777. The cubic root of 103191312 is about 469.0448566926.

The spelling of 103191312 in words is "one hundred three million, one hundred ninety-one thousand, three hundred twelve".