1971223200 has 216 divisors, whose sum is σ = 7113794688. Its totient is φ = 513354240.

The previous prime is 1971223183. The next prime is 1971223249. The reversal of 1971223200 is 23221791.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 306417 + ... + 312783.

Almost surely, 2^1971223200 is an apocalyptic number.

1971223200 is a gapful number since it is divisible by the number (10) 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 1971223200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3556897344).

1971223200 is an abundant number, since it is smaller than the sum of its proper divisors (5142571488).

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

1971223200 is a wasteful number, since it uses less digits than its factorization.

1971223200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6436 (or 6420 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 1971223200 is about 44398.4594327326. The cubic root of 1971223200 is about 1253.8490848047.

Adding to 1971223200 its reverse (23221791), we get a palindrome (1994444991).

The spelling of 1971223200 in words is "one billion, nine hundred seventy-one million, two hundred twenty-three thousand, two hundred".