51609601 has 4 divisors (see below), whose sum is σ = 52484400. Its totient is φ = 50734804.

The previous prime is 51609541. The next prime is 51609617. The reversal of 51609601 is 10690615.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51609601 - 2¹⁹ = 51085313 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51609601.

It is not an unprimeable number, because it can be changed into a prime (51609641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 437311 + ... + 437428.

It is an arithmetic number, because the mean of its divisors is an integer number (13121100).

It is a Proth number, since it is equal to 1575 ⋅ 2¹⁵ + 1 and 1575 < 2¹⁵.

Almost surely, 2^51609601 is an apocalyptic number.

It is an amenable number.

51609601 is a deficient number, since it is larger than the sum of its proper divisors (874799).

51609601 is an equidigital number, since it uses as much as digits as its factorization.

51609601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874798.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 51609601 is about 7183.9822522052. The cubic root of 51609601 is about 372.3146858368.

The spelling of 51609601 in words is "fifty-one million, six hundred nine thousand, six hundred one".