51609605 has 8 divisors (see below), whose sum is σ = 65191200. Its totient is φ = 39114576.

The previous prime is 51609541. The next prime is 51609617. The reversal of 51609605 is 50690615.

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 51609605 - 2⁶ = 51609541 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, 271535 + ... + 271724.

It is an arithmetic number, because the mean of its divisors is an integer number (8148900).

Almost surely, 2^51609605 is an apocalyptic number.

It is an amenable number.

51609605 is a deficient number, since it is larger than the sum of its proper divisors (13581595).

51609605 is a wasteful number, since it uses less digits than its factorization.

51609605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543283.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 51609605 is about 7183.9825306024. The cubic root of 51609605 is about 372.3146954555.

The spelling of 51609605 in words is "fifty-one million, six hundred nine thousand, six hundred five".