51140023 has 8 divisors (see below), whose sum is σ = 56417040. Its totient is φ = 45967680.

The previous prime is 51140009. The next prime is 51140069. The reversal of 51140023 is 32004115.

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

It is a de Polignac number, because none of the positive numbers 2^k-51140023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51139979 and 51140006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51140003) 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, 25140 + ... + 27097.

It is an arithmetic number, because the mean of its divisors is an integer number (7052130).

Almost surely, 2^51140023 is an apocalyptic number.

51140023 is a deficient number, since it is larger than the sum of its proper divisors (5277017).

51140023 is a wasteful number, since it uses less digits than its factorization.

51140023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52337.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 51140023 is about 7151.2252796287. The cubic root of 51140023 is about 371.1820559869.

Adding to 51140023 its reverse (32004115), we get a palindrome (83144138).

The spelling of 51140023 in words is "fifty-one million, one hundred forty thousand, twenty-three".