51577216 has 16 divisors (see below), whose sum is σ = 102751740. Its totient is φ = 25788544.

The previous prime is 51577213. The next prime is 51577241. The reversal of 51577216 is 61277515.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51577213) 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 as a sum of consecutive naturals, namely, 201346 + ... + 201601.

Almost surely, 2^51577216 is an apocalyptic number.

It is an amenable number.

51577216 is a deficient number, since it is larger than the sum of its proper divisors (51174524).

51577216 is an equidigital number, since it uses as much as digits as its factorization.

51577216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402961 (or 402949 counting only the distinct ones).

The product of its digits is 14700, while the sum is 34.

The square root of 51577216 is about 7181.7279257850. The cubic root of 51577216 is about 372.2367937795.

The spelling of 51577216 in words is "fifty-one million, five hundred seventy-seven thousand, two hundred sixteen".