51382251 has 12 divisors (see below), whose sum is σ = 78125320. Its totient is φ = 32451840.

The previous prime is 51382237. The next prime is 51382259. The reversal of 51382251 is 15228315.

It is a happy number.

It is not a de Polignac number, because 51382251 - 2⁶ = 51382187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51382259) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 150070 + ... + 150411.

Almost surely, 2^51382251 is an apocalyptic number.

51382251 is a deficient number, since it is larger than the sum of its proper divisors (26743069).

51382251 is a wasteful number, since it uses less digits than its factorization.

51382251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300506 (or 300503 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 51382251 is about 7168.1413909046. The cubic root of 51382251 is about 371.7671756788.

The spelling of 51382251 in words is "fifty-one million, three hundred eighty-two thousand, two hundred fifty-one".