51869737 has 4 divisors (see below), whose sum is σ = 54920916. Its totient is φ = 48818560.

The previous prime is 51869729. The next prime is 51869743. The reversal of 51869737 is 73796815.

51869737 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 23609881 + 28259856 = 4859^2 + 5316^2 .

It is not a de Polignac number, because 51869737 - 2³ = 51869729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51869767) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1525564 + ... + 1525597.

It is an arithmetic number, because the mean of its divisors is an integer number (13730229).

Almost surely, 2^51869737 is an apocalyptic number.

It is an amenable number.

51869737 is a deficient number, since it is larger than the sum of its proper divisors (3051179).

51869737 is a wasteful number, since it uses less digits than its factorization.

51869737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3051178.

The product of its digits is 317520, while the sum is 46.

The square root of 51869737 is about 7202.0647733827. The cubic root of 51869737 is about 372.9391832074.

The spelling of 51869737 in words is "fifty-one million, eight hundred sixty-nine thousand, seven hundred thirty-seven".