51401423 has 2 divisors, whose sum is σ = 51401424. Its totient is φ = 51401422.

The previous prime is 51401419. The next prime is 51401443. The reversal of 51401423 is 32410415.

It is an a-pointer prime, because the next prime (51401443) can be obtained adding 51401423 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51401423 - 2² = 51401419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51401395 and 51401404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51401443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25700711 + 25700712.

It is an arithmetic number, because the mean of its divisors is an integer number (25700712).

Almost surely, 2^51401423 is an apocalyptic number.

51401423 is a deficient number, since it is larger than the sum of its proper divisors (1).

51401423 is an equidigital number, since it uses as much as digits as its factorization.

51401423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 51401423 is about 7169.4785723928. The cubic root of 51401423 is about 371.8134084658.

Adding to 51401423 its reverse (32410415), we get a palindrome (83811838).

The spelling of 51401423 in words is "fifty-one million, four hundred one thousand, four hundred twenty-three".