1971715216 has 45 divisors (see below), whose sum is σ = 4064358571. Its totient is φ = 926445056.

The previous prime is 1971715183. The next prime is 1971715271. The reversal of 1971715216 is 6125171791.

The square root of 1971715216 is 44404.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 355216 + 1971360000 = 596^2 + 44400^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3019146 + ... + 3019798.

Almost surely, 2^1971715216 is an apocalyptic number.

1971715216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1971715216 is the 44404-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1971715216

1971715216 is an abundant number, since it is smaller than the sum of its proper divisors (2092643355).

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

1971715216 is an frugal number, since it uses more digits than its factorization.

1971715216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348 (or 672 counting only the distinct ones).

The product of its digits is 26460, while the sum is 40.

The cubic root of 1971715216 is about 1253.9533960925.

The spelling of 1971715216 in words is "one billion, nine hundred seventy-one million, seven hundred fifteen thousand, two hundred sixteen".