51849151 has 4 divisors (see below), whose sum is σ = 51865072. Its totient is φ = 51833232.

The previous prime is 51849139. The next prime is 51849179. The reversal of 51849151 is 15194815.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15194815 = 5 ⋅3038963.

It is a cyclic number.

It is not a de Polignac number, because 51849151 - 2¹⁹ = 51324863 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 (51849121) 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 3 ways as a sum of consecutive naturals, for example, 1110 + ... + 10243.

It is an arithmetic number, because the mean of its divisors is an integer number (12966268).

Almost surely, 2^51849151 is an apocalyptic number.

51849151 is a deficient number, since it is larger than the sum of its proper divisors (15921).

51849151 is a wasteful number, since it uses less digits than its factorization.

51849151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15920.

The product of its digits is 7200, while the sum is 34.

The square root of 51849151 is about 7200.6354580690. The cubic root of 51849151 is about 372.8898394581.

The spelling of 51849151 in words is "fifty-one million, eight hundred forty-nine thousand, one hundred fifty-one".