51571923 has 8 divisors (see below), whose sum is σ = 74052048. Its totient is φ = 31736544.

The previous prime is 51571867. The next prime is 51571937. The reversal of 51571923 is 32917515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51571923 - 2⁹ = 51571411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51571943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 661140 + ... + 661217.

It is an arithmetic number, because the mean of its divisors is an integer number (9256506).

Almost surely, 2^51571923 is an apocalyptic number.

51571923 is a deficient number, since it is larger than the sum of its proper divisors (22480125).

51571923 is a wasteful number, since it uses less digits than its factorization.

51571923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322373.

The product of its digits is 9450, while the sum is 33.

The square root of 51571923 is about 7181.3594116992. The cubic root of 51571923 is about 372.2240600125.

The spelling of 51571923 in words is "fifty-one million, five hundred seventy-one thousand, nine hundred twenty-three".