51142164 has 24 divisors (see below), whose sum is σ = 120136800. Its totient is φ = 16932384.

The previous prime is 51142139. The next prime is 51142187. The reversal of 51142164 is 46124115.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 12514 + ... + 16089.

It is an arithmetic number, because the mean of its divisors is an integer number (5005700).

Almost surely, 2^51142164 is an apocalyptic number.

It is an amenable number.

51142164 is an abundant number, since it is smaller than the sum of its proper divisors (68994636).

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

51142164 is a wasteful number, since it uses less digits than its factorization.

51142164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28759 (or 28757 counting only the distinct ones).

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

The square root of 51142164 is about 7151.3749726888. The cubic root of 51142164 is about 371.1872358157.

Adding to 51142164 its reverse (46124115), we get a palindrome (97266279).

The spelling of 51142164 in words is "fifty-one million, one hundred forty-two thousand, one hundred sixty-four".