51813671 has 16 divisors (see below), whose sum is σ = 67523904. Its totient is φ = 38582784.

The previous prime is 51813647. The next prime is 51813677. The reversal of 51813671 is 17631815.

It is a cyclic number.

It is not a de Polignac number, because 51813671 - 2²² = 47619367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51813677) 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, 15200 + ... + 18293.

It is an arithmetic number, because the mean of its divisors is an integer number (4220244).

Almost surely, 2^51813671 is an apocalyptic number.

51813671 is a deficient number, since it is larger than the sum of its proper divisors (15710233).

51813671 is a wasteful number, since it uses less digits than its factorization.

51813671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33530.

The product of its digits is 5040, while the sum is 32.

The square root of 51813671 is about 7198.1713650065. The cubic root of 51813671 is about 372.8047647741.

The spelling of 51813671 in words is "fifty-one million, eight hundred thirteen thousand, six hundred seventy-one".