51571131 has 4 divisors (see below), whose sum is σ = 68761512. Its totient is φ = 34380752.

The previous prime is 51571123. The next prime is 51571159. The reversal of 51571131 is 13117515.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51571131 - 2³ = 51571123 is a prime.

It is a super-2 number, since 2×51571131² = 5319163105238322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51571171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8595186 + ... + 8595191.

It is an arithmetic number, because the mean of its divisors is an integer number (17190378).

Almost surely, 2^51571131 is an apocalyptic number.

51571131 is a deficient number, since it is larger than the sum of its proper divisors (17190381).

51571131 is a wasteful number, since it uses less digits than its factorization.

51571131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17190380.

The product of its digits is 525, while the sum is 24.

The square root of 51571131 is about 7181.3042687244. The cubic root of 51571131 is about 372.2221545638. Note that the first 3 decimals are identical.

Adding to 51571131 its reverse (13117515), we get a palindrome (64688646).

The spelling of 51571131 in words is "fifty-one million, five hundred seventy-one thousand, one hundred thirty-one".