51701849 has 4 divisors (see below), whose sum is σ = 51746100. Its totient is φ = 51657600.

The previous prime is 51701803. The next prime is 51701851. The reversal of 51701849 is 94810715.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18983449 + 32718400 = 4357^2 + 5720^2 .

It is a cyclic number.

It is not a de Polignac number, because 51701849 - 2¹² = 51697753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51701249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20324 + ... + 22725.

It is an arithmetic number, because the mean of its divisors is an integer number (12936525).

Almost surely, 2^51701849 is an apocalyptic number.

It is an amenable number.

51701849 is a deficient number, since it is larger than the sum of its proper divisors (44251).

51701849 is a wasteful number, since it uses less digits than its factorization.

51701849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44250.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 51701849 is about 7190.3997802626. The cubic root of 51701849 is about 372.5363812941.

The spelling of 51701849 in words is "fifty-one million, seven hundred one thousand, eight hundred forty-nine".