51576431 has 6 divisors (see below), whose sum is σ = 54434232. Its totient is φ = 48861540.

The previous prime is 51576407. The next prime is 51576433. The reversal of 51576431 is 13467515.

It is not a de Polignac number, because 51576431 - 2¹⁸ = 51314287 is a prime.

It is a super-2 number, since 2×51576431² = 5320256469395522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51576433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71075 + ... + 71796.

It is an arithmetic number, because the mean of its divisors is an integer number (9072372).

Almost surely, 2^51576431 is an apocalyptic number.

51576431 is a deficient number, since it is larger than the sum of its proper divisors (2857801).

51576431 is a wasteful number, since it uses less digits than its factorization.

51576431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142909 (or 142890 counting only the distinct ones).

The product of its digits is 12600, while the sum is 32.

The square root of 51576431 is about 7181.6732729915. The cubic root of 51576431 is about 372.2349053012.

The spelling of 51576431 in words is "fifty-one million, five hundred seventy-six thousand, four hundred thirty-one".