51604969 has 8 divisors (see below), whose sum is σ = 58499840. Its totient is φ = 45128016.

The previous prime is 51604951. The next prime is 51604997. The reversal of 51604969 is 96940615.

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 51604969 - 2¹¹ = 51602921 is a prime.

It is a super-2 number, since 2×51604969² = 5326145650981922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51604909) 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, 104217 + ... + 104710.

It is an arithmetic number, because the mean of its divisors is an integer number (7312480).

Almost surely, 2^51604969 is an apocalyptic number.

It is an amenable number.

51604969 is a deficient number, since it is larger than the sum of its proper divisors (6894871).

51604969 is a wasteful number, since it uses less digits than its factorization.

51604969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208959.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 51604969 is about 7183.6598611014. The cubic root of 51604969 is about 372.3035469971.

It can be divided in two parts, 5160496 and 9, that multiplied together give a palindrome (46444464).

The spelling of 51604969 in words is "fifty-one million, six hundred four thousand, nine hundred sixty-nine".