51604129 has 6 divisors (see below), whose sum is σ = 54818534. Its totient is φ = 48568320.

The previous prime is 51604127. The next prime is 51604183. The reversal of 51604129 is 92140615.

It can be written as a sum of positive squares in 3 ways, for example, as 10387729 + 41216400 = 3223^2 + 6420^2 .

It is not a de Polignac number, because 51604129 - 2¹ = 51604127 is a prime.

It is a super-2 number, since 2×51604129² = 5325972259697282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51604097 and 51604106.

It is not an unprimeable number, because it can be changed into a prime (51604121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 88992 + ... + 89569.

Almost surely, 2^51604129 is an apocalyptic number.

It is an amenable number.

51604129 is a deficient number, since it is larger than the sum of its proper divisors (3214405).

51604129 is a wasteful number, since it uses less digits than its factorization.

51604129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178595 (or 178578 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 51604129 is about 7183.6013948437. The cubic root of 51604129 is about 372.3015269288.

The spelling of 51604129 in words is "fifty-one million, six hundred four thousand, one hundred twenty-nine".