51755387 has 4 divisors (see below), whose sum is σ = 51782016. Its totient is φ = 51728760.

The previous prime is 51755381. The next prime is 51755419. The reversal of 51755387 is 78355715.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51755387 - 2⁴ = 51755371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51755381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10148 + ... + 14369.

It is an arithmetic number, because the mean of its divisors is an integer number (12945504).

Almost surely, 2^51755387 is an apocalyptic number.

51755387 is a deficient number, since it is larger than the sum of its proper divisors (26629).

51755387 is a wasteful number, since it uses less digits than its factorization.

51755387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26628.

The product of its digits is 147000, while the sum is 41.

The square root of 51755387 is about 7194.1216976084. The cubic root of 51755387 is about 372.6649258416.

The spelling of 51755387 in words is "fifty-one million, seven hundred fifty-five thousand, three hundred eighty-seven".