51038237249 has 4 divisors (see below), whose sum is σ = 51041586864. Its totient is φ = 51034887636.

The previous prime is 51038237231. The next prime is 51038237279. The reversal of 51038237249 is 94273283015.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51038237249 is a prime.

It is a super-2 number, since 2×51038237249² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51038237279) 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, 1651847 + ... + 1682460.

It is an arithmetic number, because the mean of its divisors is an integer number (12760396716).

Almost surely, 2^51038237249 is an apocalyptic number.

It is an amenable number.

51038237249 is a deficient number, since it is larger than the sum of its proper divisors (3349615).

51038237249 is a wasteful number, since it uses less digits than its factorization.

51038237249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3349614.

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 51038237249 in words is "fifty-one billion, thirty-eight million, two hundred thirty-seven thousand, two hundred forty-nine".