51438523 has 4 divisors (see below), whose sum is σ = 51453280. Its totient is φ = 51423768.

The previous prime is 51438521. The next prime is 51438533. The reversal of 51438523 is 32583415.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 51438523 - 2¹ = 51438521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51438521) 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, 1093 + ... + 10201.

It is an arithmetic number, because the mean of its divisors is an integer number (12863320).

Almost surely, 2^51438523 is an apocalyptic number.

51438523 is a deficient number, since it is larger than the sum of its proper divisors (14757).

51438523 is an equidigital number, since it uses as much as digits as its factorization.

51438523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14756.

The product of its digits is 14400, while the sum is 31.

The square root of 51438523 is about 7172.0654626126. The cubic root of 51438523 is about 371.9028415282.

The spelling of 51438523 in words is "fifty-one million, four hundred thirty-eight thousand, five hundred twenty-three".