51943686 has 16 divisors (see below), whose sum is σ = 104004864. Its totient is φ = 17294984.

The previous prime is 51943681. The next prime is 51943691. The reversal of 51943686 is 68634915.

It is an interprime number because it is at equal distance from previous prime (51943681) and next prime (51943691).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51943681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1495 + ... + 10301.

It is an arithmetic number, because the mean of its divisors is an integer number (6500304).

Almost surely, 2^51943686 is an apocalyptic number.

51943686 is an abundant number, since it is smaller than the sum of its proper divisors (52061178).

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

51943686 is a wasteful number, since it uses less digits than its factorization.

51943686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9795.

The product of its digits is 155520, while the sum is 42.

The square root of 51943686 is about 7207.1968198461. The cubic root of 51943686 is about 373.1163281459.

The spelling of 51943686 in words is "fifty-one million, nine hundred forty-three thousand, six hundred eighty-six".