51055535 has 4 divisors (see below), whose sum is σ = 61266648. Its totient is φ = 40844424.

The previous prime is 51055519. The next prime is 51055553. The reversal of 51055535 is 53555015.

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

It is a cyclic number.

It is not a de Polignac number, because 51055535 - 2⁴ = 51055519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51055498 and 51055507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5105549 + ... + 5105558.

It is an arithmetic number, because the mean of its divisors is an integer number (15316662).

Almost surely, 2^51055535 is an apocalyptic number.

51055535 is a deficient number, since it is larger than the sum of its proper divisors (10211113).

51055535 is a wasteful number, since it uses less digits than its factorization.

51055535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10211112.

The product of its (nonzero) digits is 9375, while the sum is 29.

The square root of 51055535 is about 7145.3155983483. The cubic root of 51055535 is about 370.9775344030.

The spelling of 51055535 in words is "fifty-one million, fifty-five thousand, five hundred thirty-five".