51672609 has 24 divisors (see below), whose sum is σ = 80699840. Its totient is φ = 31749408.

The previous prime is 51672589. The next prime is 51672619. The reversal of 51672609 is 90627615.

It is not a de Polignac number, because 51672609 - 2⁹ = 51672097 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51672619) 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 23 ways as a sum of consecutive naturals, for example, 2244 + ... + 10410.

Almost surely, 2^51672609 is an apocalyptic number.

It is an amenable number.

51672609 is a deficient number, since it is larger than the sum of its proper divisors (29027231).

51672609 is a wasteful number, since it uses less digits than its factorization.

51672609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8229 (or 8226 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 51672609 is about 7188.3662260628. The cubic root of 51672609 is about 372.4661386874.

It can be divided in two parts, 5167 and 2609, that added together give a 5-th power (7776 = 6⁵).

The spelling of 51672609 in words is "fifty-one million, six hundred seventy-two thousand, six hundred nine".