51102642 has 32 divisors (see below), whose sum is σ = 108260352. Its totient is φ = 16047504.

The previous prime is 51102637. The next prime is 51102659. The reversal of 51102642 is 24620115.

51102642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51102642² = 5222960038760328, which contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 6483 + ... + 12009.

It is an arithmetic number, because the mean of its divisors is an integer number (3383136).

Almost surely, 2^51102642 is an apocalyptic number.

51102642 is an abundant number, since it is smaller than the sum of its proper divisors (57157710).

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

51102642 is a wasteful number, since it uses less digits than its factorization.

51102642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5622.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 51102642 is about 7148.6111937914. The cubic root of 51102642 is about 371.0915949501.

Adding to 51102642 its reverse (24620115), we get a palindrome (75722757).

The spelling of 51102642 in words is "fifty-one million, one hundred two thousand, six hundred forty-two".