51625161 has 16 divisors (see below), whose sum is σ = 87408000. Its totient is φ = 29499984.

The previous prime is 51625151. The next prime is 51625163. The reversal of 51625161 is 16152615.

It is a happy number.

It is not a de Polignac number, because 51625161 - 2⁶ = 51625097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51625163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136386 + ... + 136763.

It is an arithmetic number, because the mean of its divisors is an integer number (5463000).

Almost surely, 2^51625161 is an apocalyptic number.

It is an amenable number.

51625161 is a deficient number, since it is larger than the sum of its proper divisors (35782839).

51625161 is a wasteful number, since it uses less digits than its factorization.

51625161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273165 (or 273159 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 51625161 is about 7185.0651354041. The cubic root of 51625161 is about 372.3520989943.

Adding to 51625161 its reverse (16152615), we get a palindrome (67777776).

The spelling of 51625161 in words is "fifty-one million, six hundred twenty-five thousand, one hundred sixty-one".