51555423 has 4 divisors (see below), whose sum is σ = 68740568. Its totient is φ = 34370280.

The previous prime is 51555421. The next prime is 51555437. The reversal of 51555423 is 32455515.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 51555423 - 2¹ = 51555421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51555421) 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, 8592568 + ... + 8592573.

It is an arithmetic number, because the mean of its divisors is an integer number (17185142).

Almost surely, 2^51555423 is an apocalyptic number.

51555423 is a deficient number, since it is larger than the sum of its proper divisors (17185145).

51555423 is a wasteful number, since it uses less digits than its factorization.

51555423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17185144.

The product of its digits is 15000, while the sum is 30.

The square root of 51555423 is about 7180.2105122343. The cubic root of 51555423 is about 372.1843591330.

The spelling of 51555423 in words is "fifty-one million, five hundred fifty-five thousand, four hundred twenty-three".