51886530 has 72 divisors (see below), whose sum is σ = 142468092. Its totient is φ = 13099968.

The previous prime is 51886493. The next prime is 51886553. The reversal of 51886530 is 3568815.

It can be written as a sum of positive squares in 2 ways, for example, as 49154121 + 2732409 = 7011^2 + 1653^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 31692 + ... + 33288.

Almost surely, 2^51886530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51886530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71234046).

51886530 is an abundant number, since it is smaller than the sum of its proper divisors (90581562).

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

51886530 is a wasteful number, since it uses less digits than its factorization.

51886530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1648 (or 1626 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 51886530 is about 7203.2305252574. The cubic root of 51886530 is about 372.9794256322.

The spelling of 51886530 in words is "fifty-one million, eight hundred eighty-six thousand, five hundred thirty".