51886140 has 48 divisors (see below), whose sum is σ = 147460992. Its totient is φ = 13628736.

The previous prime is 51886139. The next prime is 51886141. The reversal of 51886140 is 4168815.

It is an interprime number because it is at equal distance from previous prime (51886139) and next prime (51886141).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51886141) 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, 2434 + ... + 10473.

It is an arithmetic number, because the mean of its divisors is an integer number (3072104).

Almost surely, 2^51886140 is an apocalyptic number.

It is an amenable number.

51886140 is an abundant number, since it is smaller than the sum of its proper divisors (95574852).

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

51886140 is a wasteful number, since it uses less digits than its factorization.

51886140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12986 (or 12984 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 51886140 is about 7203.2034540196. The cubic root of 51886140 is about 372.9784911421.

The spelling of 51886140 in words is "fifty-one million, eight hundred eighty-six thousand, one hundred forty".