51013143 has 12 divisors (see below), whose sum is σ = 75483408. Its totient is φ = 33179040.

The previous prime is 51013129. The next prime is 51013159. The reversal of 51013143 is 34131015.

51013143 is a `hidden beast` number, since 510 + 13 + 143 = 666.

It is not a de Polignac number, because 51013143 - 2¹⁰ = 51012119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51013163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68755 + ... + 69492.

It is an arithmetic number, because the mean of its divisors is an integer number (6290284).

Almost surely, 2^51013143 is an apocalyptic number.

51013143 is a deficient number, since it is larger than the sum of its proper divisors (24470265).

51013143 is a wasteful number, since it uses less digits than its factorization.

51013143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138294 (or 138291 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 51013143 is about 7142.3485633229. The cubic root of 51013143 is about 370.8748303294.

Adding to 51013143 its reverse (34131015), we get a palindrome (85144158).

The spelling of 51013143 in words is "fifty-one million, thirteen thousand, one hundred forty-three".