51424535 has 4 divisors (see below), whose sum is σ = 61709448. Its totient is φ = 41139624.

The previous prime is 51424531. The next prime is 51424543. The reversal of 51424535 is 53542415.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 53542415 = 5 ⋅10708483.

It is a cyclic number.

It is not a de Polignac number, because 51424535 - 2² = 51424531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51424498 and 51424507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51424531) 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, 5142449 + ... + 5142458.

It is an arithmetic number, because the mean of its divisors is an integer number (15427362).

Almost surely, 2^51424535 is an apocalyptic number.

51424535 is a deficient number, since it is larger than the sum of its proper divisors (10284913).

51424535 is a wasteful number, since it uses less digits than its factorization.

51424535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10284912.

The product of its digits is 12000, while the sum is 29.

The square root of 51424535 is about 7171.0902239478. The cubic root of 51424535 is about 371.8691271817.

The spelling of 51424535 in words is "fifty-one million, four hundred twenty-four thousand, five hundred thirty-five".