51428423 has 2 divisors, whose sum is σ = 51428424. Its totient is φ = 51428422.

The previous prime is 51428407. The next prime is 51428441. The reversal of 51428423 is 32482415.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51428423 - 2⁴ = 51428407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51428123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25714211 + 25714212.

It is an arithmetic number, because the mean of its divisors is an integer number (25714212).

Almost surely, 2^51428423 is an apocalyptic number.

51428423 is a deficient number, since it is larger than the sum of its proper divisors (1).

51428423 is an equidigital number, since it uses as much as digits as its factorization.

51428423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7680, while the sum is 29.

The square root of 51428423 is about 7171.3613073112. The cubic root of 51428423 is about 371.8784987831.

The spelling of 51428423 in words is "fifty-one million, four hundred twenty-eight thousand, four hundred twenty-three".