51243585 has 8 divisors (see below), whose sum is σ = 81989760. Its totient is φ = 27329904.

The previous prime is 51243541. The next prime is 51243629. The reversal of 51243585 is 58534215.

It is an interprime number because it is at equal distance from previous prime (51243541) and next prime (51243629).

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

It is not a de Polignac number, because 51243585 - 2¹⁰ = 51242561 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1708105 + ... + 1708134.

It is an arithmetic number, because the mean of its divisors is an integer number (10248720).

Almost surely, 2^51243585 is an apocalyptic number.

It is an amenable number.

51243585 is a deficient number, since it is larger than the sum of its proper divisors (30746175).

51243585 is a wasteful number, since it uses less digits than its factorization.

51243585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3416247.

The product of its digits is 24000, while the sum is 33.

The square root of 51243585 is about 7158.4624745821. The cubic root of 51243585 is about 371.4324432887.

The spelling of 51243585 in words is "fifty-one million, two hundred forty-three thousand, five hundred eighty-five".