51472161 has 36 divisors (see below), whose sum is σ = 82484688. Its totient is φ = 30899232.

The previous prime is 51472123. The next prime is 51472163. The reversal of 51472161 is 16127415.

It is a happy number.

It is not a de Polignac number, because 51472161 - 2⁹ = 51471649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51472163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 65010 + ... + 65796.

Almost surely, 2^51472161 is an apocalyptic number.

It is an amenable number.

51472161 is a deficient number, since it is larger than the sum of its proper divisors (31012527).

51472161 is a wasteful number, since it uses less digits than its factorization.

51472161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862 (or 846 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 51472161 is about 7174.4101499705. The cubic root of 51472161 is about 371.9838919491.

Adding to 51472161 its reverse (16127415), we get a palindrome (67599576).

The spelling of 51472161 in words is "fifty-one million, four hundred seventy-two thousand, one hundred sixty-one".