51342427 has 4 divisors (see below), whose sum is σ = 54044680. Its totient is φ = 48640176.

The previous prime is 51342407. The next prime is 51342451. The reversal of 51342427 is 72424315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72424315 = 5 ⋅14484863.

It is a cyclic number.

It is not a de Polignac number, because 51342427 - 2¹¹ = 51340379 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51342395 and 51342404.

It is not an unprimeable number, because it can be changed into a prime (51342407) 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, 1351098 + ... + 1351135.

It is an arithmetic number, because the mean of its divisors is an integer number (13511170).

Almost surely, 2^51342427 is an apocalyptic number.

51342427 is a deficient number, since it is larger than the sum of its proper divisors (2702253).

51342427 is a wasteful number, since it uses less digits than its factorization.

51342427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2702252.

The product of its digits is 6720, while the sum is 28.

The square root of 51342427 is about 7165.3630054590. The cubic root of 51342427 is about 371.6711043551.

The spelling of 51342427 in words is "fifty-one million, three hundred forty-two thousand, four hundred twenty-seven".