51155543 has 8 divisors (see below), whose sum is σ = 53913600. Its totient is φ = 48404088.

The previous prime is 51155539. The next prime is 51155551. The reversal of 51155543 is 34555115.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51155543 - 2² = 51155539 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 (51155443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29930 + ... + 31592.

It is an arithmetic number, because the mean of its divisors is an integer number (6739200).

Almost surely, 2^51155543 is an apocalyptic number.

51155543 is a deficient number, since it is larger than the sum of its proper divisors (2758057).

51155543 is a wasteful number, since it uses less digits than its factorization.

51155543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3301.

The product of its digits is 7500, while the sum is 29.

The square root of 51155543 is about 7152.3103260415. The cubic root of 51155543 is about 371.2196010283.

The spelling of 51155543 in words is "fifty-one million, one hundred fifty-five thousand, five hundred forty-three".