51284031 has 4 divisors (see below), whose sum is σ = 68378712. Its totient is φ = 34189352.

The previous prime is 51284029. The next prime is 51284047. The reversal of 51284031 is 13048215.

51284031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51284031 - 2¹ = 51284029 is a prime.

It is a super-2 number, since 2×51284031² = 5260103671217922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51283992 and 51284010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51284131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8547336 + ... + 8547341.

It is an arithmetic number, because the mean of its divisors is an integer number (17094678).

Almost surely, 2^51284031 is an apocalyptic number.

51284031 is a deficient number, since it is larger than the sum of its proper divisors (17094681).

51284031 is a wasteful number, since it uses less digits than its factorization.

51284031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17094680.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 51284031 is about 7161.2869653436. The cubic root of 51284031 is about 371.5301401084.

The spelling of 51284031 in words is "fifty-one million, two hundred eighty-four thousand, thirty-one".