51601169 has 4 divisors (see below), whose sum is σ = 54317040. Its totient is φ = 48885300.

The previous prime is 51601157. The next prime is 51601211. The reversal of 51601169 is 96110615.

51601169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 96110615 = 5 ⋅19222123.

It is a cyclic number.

It is not a de Polignac number, because 51601169 - 2⁴ = 51601153 is a prime.

It is a super-2 number, since 2×51601169² = 5325361284333122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51601129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1357907 + ... + 1357944.

It is an arithmetic number, because the mean of its divisors is an integer number (13579260).

Almost surely, 2^51601169 is an apocalyptic number.

It is an amenable number.

51601169 is a deficient number, since it is larger than the sum of its proper divisors (2715871).

51601169 is a wasteful number, since it uses less digits than its factorization.

51601169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2715870.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 51601169 is about 7183.3953670949. The cubic root of 51601169 is about 372.2944084184.

The spelling of 51601169 in words is "fifty-one million, six hundred one thousand, one hundred sixty-nine".