51142131 has 16 divisors (see below), whose sum is σ = 76316800. Its totient is φ = 33846984.

The previous prime is 51142127. The next prime is 51142139. The reversal of 51142131 is 13124115.

It is not a de Polignac number, because 51142131 - 2² = 51142127 is a prime.

It is a super-2 number, since 2×51142131² = 5231035126442322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51142139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3061 + ... + 10566.

It is an arithmetic number, because the mean of its divisors is an integer number (4769800).

Almost surely, 2^51142131 is an apocalyptic number.

51142131 is a deficient number, since it is larger than the sum of its proper divisors (25174669).

51142131 is a wasteful number, since it uses less digits than its factorization.

51142131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13775 (or 13769 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 51142131 is about 7151.3726654398. The cubic root of 51142131 is about 371.1871559782.

Adding to 51142131 its reverse (13124115), we get a palindrome (64266246).

The spelling of 51142131 in words is "fifty-one million, one hundred forty-two thousand, one hundred thirty-one".