51551169 has 8 divisors (see below), whose sum is σ = 69196800. Its totient is φ = 34136496.

The previous prime is 51551147. The next prime is 51551173. The reversal of 51551169 is 96115515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51551169 - 2⁸ = 51550913 is a prime.

It is a super-2 number, since 2×51551169² = 5315046050533122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51551179) 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, 57217 + ... + 58110.

It is an arithmetic number, because the mean of its divisors is an integer number (8649600).

Almost surely, 2^51551169 is an apocalyptic number.

It is an amenable number.

51551169 is a deficient number, since it is larger than the sum of its proper divisors (17645631).

51551169 is a wasteful number, since it uses less digits than its factorization.

51551169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115479.

The product of its digits is 6750, while the sum is 33.

The square root of 51551169 is about 7179.9142752543. The cubic root of 51551169 is about 372.1741221510.

The spelling of 51551169 in words is "fifty-one million, five hundred fifty-one thousand, one hundred sixty-nine".