51618005 has 8 divisors (see below), whose sum is σ = 61997400. Its totient is φ = 41257216.

The previous prime is 51617983. The next prime is 51618011. The reversal of 51618005 is 50081615.

It can be written as a sum of positive squares in 4 ways, for example, as 14760964 + 36857041 = 3842^2 + 6071^2 .

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 51618005 - 2⁸ = 51617749 is a prime.

It is a Curzon number.

It is a congruent 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, 2441 + ... + 10449.

It is an arithmetic number, because the mean of its divisors is an integer number (7749675).

Almost surely, 2^51618005 is an apocalyptic number.

It is an amenable number.

51618005 is a deficient number, since it is larger than the sum of its proper divisors (10379395).

51618005 is a wasteful number, since it uses less digits than its factorization.

51618005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9303.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 51618005 is about 7184.5671407539. The cubic root of 51618005 is about 372.3348937228.

The spelling of 51618005 in words is "fifty-one million, six hundred eighteen thousand, five".