1721915952 has 20 divisors (see below), whose sum is σ = 4448283000. Its totient is φ = 573971968.

The previous prime is 1721915947. The next prime is 1721915959. The reversal of 1721915952 is 2595191271.

It is not an unprimeable number, because it can be changed into a prime (1721915959) 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 3 ways as a sum of consecutive naturals, for example, 17936577 + ... + 17936672.

It is an arithmetic number, because the mean of its divisors is an integer number (222414150).

Almost surely, 2^1721915952 is an apocalyptic number.

1721915952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1721915952 is an abundant number, since it is smaller than the sum of its proper divisors (2726367048).

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

1721915952 is a wasteful number, since it uses less digits than its factorization.

1721915952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35873260 (or 35873254 counting only the distinct ones).

The product of its digits is 56700, while the sum is 42.

The square root of 1721915952 is about 41495.9751301256. The cubic root of 1721915952 is about 1198.5899994532.

The spelling of 1721915952 in words is "one billion, seven hundred twenty-one million, nine hundred fifteen thousand, nine hundred fifty-two".