51642151 has 8 divisors (see below), whose sum is σ = 56711808. Its totient is φ = 46635000.

The previous prime is 51642139. The next prime is 51642163. The reversal of 51642151 is 15124615.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51642139) and next prime (51642163).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51642151 - 2⁵ = 51642119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51642191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13885 + ... + 17206.

It is an arithmetic number, because the mean of its divisors is an integer number (7088976).

Almost surely, 2^51642151 is an apocalyptic number.

51642151 is a deficient number, since it is larger than the sum of its proper divisors (5069657).

51642151 is a wasteful number, since it uses less digits than its factorization.

51642151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31253.

The product of its digits is 1200, while the sum is 25.

The square root of 51642151 is about 7186.2473517129. The cubic root of 51642151 is about 372.3929419229.

Adding to 51642151 its reverse (15124615), we get a palindrome (66766766).

The spelling of 51642151 in words is "fifty-one million, six hundred forty-two thousand, one hundred fifty-one".