51887247 has 16 divisors (see below), whose sum is σ = 73838592. Its totient is φ = 32296320.

The previous prime is 51887203. The next prime is 51887299. The reversal of 51887247 is 74278815.

It is not a de Polignac number, because 51887247 - 2¹² = 51883151 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51887199 and 51887208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51887447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2472 + ... + 10482.

It is an arithmetic number, because the mean of its divisors is an integer number (4614912).

Almost surely, 2^51887247 is an apocalyptic number.

51887247 is a deficient number, since it is larger than the sum of its proper divisors (21951345).

51887247 is a wasteful number, since it uses less digits than its factorization.

51887247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8158.

The product of its digits is 125440, while the sum is 42.

The square root of 51887247 is about 7203.2802944214. The cubic root of 51887247 is about 372.9811436440.

The spelling of 51887247 in words is "fifty-one million, eight hundred eighty-seven thousand, two hundred forty-seven".