51382887 has 8 divisors (see below), whose sum is σ = 68795760. Its totient is φ = 34112640.

The previous prime is 51382873. The next prime is 51382907. The reversal of 51382887 is 78828315.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51382887 - 2¹¹ = 51380839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51382187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34812 + ... + 36257.

It is an arithmetic number, because the mean of its divisors is an integer number (8599470).

Almost surely, 2^51382887 is an apocalyptic number.

51382887 is a deficient number, since it is larger than the sum of its proper divisors (17412873).

51382887 is a wasteful number, since it uses less digits than its factorization.

51382887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71313.

The product of its digits is 107520, while the sum is 42.

The square root of 51382887 is about 7168.1857537316. The cubic root of 51382887 is about 371.7687095610.

The spelling of 51382887 in words is "fifty-one million, three hundred eighty-two thousand, eight hundred eighty-seven".