51534023 has 4 divisors (see below), whose sum is σ = 54246360. Its totient is φ = 48821688.

The previous prime is 51534019. The next prime is 51534031. The reversal of 51534023 is 32043515.

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 51534023 - 2² = 51534019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51534023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51534013) 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, 1356140 + ... + 1356177.

It is an arithmetic number, because the mean of its divisors is an integer number (13561590).

Almost surely, 2^51534023 is an apocalyptic number.

51534023 is a deficient number, since it is larger than the sum of its proper divisors (2712337).

51534023 is a wasteful number, since it uses less digits than its factorization.

51534023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2712336.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 51534023 is about 7178.7201505561. The cubic root of 51534023 is about 372.1328556759.

Adding to 51534023 its reverse (32043515), we get a palindrome (83577538).

The spelling of 51534023 in words is "fifty-one million, five hundred thirty-four thousand, twenty-three".