1971273172 has 48 divisors (see below), whose sum is σ = 3815884800. Its totient is φ = 883612800.

The previous prime is 1971273163. The next prime is 1971273191. The reversal of 1971273172 is 2713721791.

It is a congruent number.

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, 1010454 + ... + 1012402.

It is an arithmetic number, because the mean of its divisors is an integer number (79497600).

Almost surely, 2^1971273172 is an apocalyptic number.

It is an amenable number.

1971273172 is a deficient number, since it is larger than the sum of its proper divisors (1844611628).

1971273172 is a wasteful number, since it uses less digits than its factorization.

1971273172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2272 (or 2270 counting only the distinct ones).

The product of its digits is 37044, while the sum is 40.

The square root of 1971273172 is about 44399.0221964403. The cubic root of 1971273172 is about 1253.8596800563.

The spelling of 1971273172 in words is "one billion, nine hundred seventy-one million, two hundred seventy-three thousand, one hundred seventy-two".