51142830 has 32 divisors (see below), whose sum is σ = 123033600. Its totient is φ = 13605792.

The previous prime is 51142829. The next prime is 51142831. The reversal of 51142830 is 3824115.

It is an interprime number because it is at equal distance from previous prime (51142829) and next prime (51142831).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51142830.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51142831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12591 + ... + 16149.

It is an arithmetic number, because the mean of its divisors is an integer number (3844800).

Almost surely, 2^51142830 is an apocalyptic number.

51142830 is an abundant number, since it is smaller than the sum of its proper divisors (71890770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51142830 is a wasteful number, since it uses less digits than its factorization.

51142830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4048.

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

The square root of 51142830 is about 7151.4215370093. The cubic root of 51142830 is about 371.1888470734.

Adding to 51142830 its reverse (3824115), we get a palindrome (54966945).

The spelling of 51142830 in words is "fifty-one million, one hundred forty-two thousand, eight hundred thirty".