51312423 has 8 divisors (see below), whose sum is σ = 68614000. Its totient is φ = 34109568.

The previous prime is 51312421. The next prime is 51312439. The reversal of 51312423 is 32421315.

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

It is not a de Polignac number, because 51312423 - 2¹ = 51312421 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 51312423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51312421) 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, 23458 + ... + 25551.

It is an arithmetic number, because the mean of its divisors is an integer number (8576750).

Almost surely, 2^51312423 is an apocalyptic number.

51312423 is a deficient number, since it is larger than the sum of its proper divisors (17301577).

51312423 is a wasteful number, since it uses less digits than its factorization.

51312423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49361.

The product of its digits is 720, while the sum is 21.

The square root of 51312423 is about 7163.2690163081. The cubic root of 51312423 is about 371.5986899572.

Adding to 51312423 its reverse (32421315), we get a palindrome (83733738).

The spelling of 51312423 in words is "fifty-one million, three hundred twelve thousand, four hundred twenty-three".