51671736 has 128 divisors (see below), whose sum is σ = 151848000. Its totient is φ = 16257024.

The previous prime is 51671729. The next prime is 51671749. The reversal of 51671736 is 63717615.

51671736 is a `hidden beast` number, since 516 + 71 + 73 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 51671736.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 457216 + ... + 457328.

Almost surely, 2^51671736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51671736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75924000).

51671736 is an abundant number, since it is smaller than the sum of its proper divisors (100176264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51671736 is a wasteful number, since it uses less digits than its factorization.

51671736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230 (or 220 counting only the distinct ones).

The product of its digits is 26460, while the sum is 36.

The square root of 51671736 is about 7188.3055026898. The cubic root of 51671736 is about 372.4640410914.

It can be divided in two parts, 5167 and 1736, that added together give a triangular number (6903 = T₁₁₇).

The spelling of 51671736 in words is "fifty-one million, six hundred seventy-one thousand, seven hundred thirty-six".