51601671 has 16 divisors (see below), whose sum is σ = 83397120. Its totient is φ = 31273560.

The previous prime is 51601651. The next prime is 51601679. The reversal of 51601671 is 17610615.

51601671 is a `hidden beast` number, since 51 + 601 + 6 + 7 + 1 = 666.

It is not a de Polignac number, because 51601671 - 2¹¹ = 51599623 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 (51601679) 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 15 ways as a sum of consecutive naturals, for example, 86575 + ... + 87168.

It is an arithmetic number, because the mean of its divisors is an integer number (5212320).

Almost surely, 2^51601671 is an apocalyptic number.

51601671 is a deficient number, since it is larger than the sum of its proper divisors (31795449).

51601671 is a wasteful number, since it uses less digits than its factorization.

51601671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173763 (or 173757 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 51601671 is about 7183.4303087035. The cubic root of 51601671 is about 372.2956156985.

The spelling of 51601671 in words is "fifty-one million, six hundred one thousand, six hundred seventy-one".