51866412 has 24 divisors (see below), whose sum is σ = 130331376. Its totient is φ = 15958848.

The previous prime is 51866407. The next prime is 51866417. The reversal of 51866412 is 21466815.

It is an interprime number because it is at equal distance from previous prime (51866407) and next prime (51866417).

It is not an unprimeable number, because it can be changed into a prime (51866417) 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, 166083 + ... + 166394.

It is an arithmetic number, because the mean of its divisors is an integer number (5430474).

Almost surely, 2^51866412 is an apocalyptic number.

51866412 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

51866412 is an abundant number, since it is smaller than the sum of its proper divisors (78464964).

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

51866412 is a wasteful number, since it uses less digits than its factorization.

51866412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332497 (or 332495 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 51866412 is about 7201.8339331034. The cubic root of 51866412 is about 372.9312142108.

The spelling of 51866412 in words is "fifty-one million, eight hundred sixty-six thousand, four hundred twelve".