51204142 has 32 divisors (see below), whose sum is σ = 86676480. Its totient is φ = 22485120.

The previous prime is 51204133. The next prime is 51204143. The reversal of 51204142 is 24140215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51204143) 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, 106659 + ... + 107137.

It is an arithmetic number, because the mean of its divisors is an integer number (2708640).

Almost surely, 2^51204142 is an apocalyptic number.

51204142 is a deficient number, since it is larger than the sum of its proper divisors (35472338).

51204142 is a wasteful number, since it uses less digits than its factorization.

51204142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 51204142 is about 7155.7069531948. The cubic root of 51204142 is about 371.3371196799.

Adding to 51204142 its reverse (24140215), we get a palindrome (75344357).

The spelling of 51204142 in words is "fifty-one million, two hundred four thousand, one hundred forty-two".