51947912 has 16 divisors (see below), whose sum is σ = 97528860. Its totient is φ = 25940224.

The previous prime is 51947911. The next prime is 51947939. The reversal of 51947912 is 21974915.

It can be written as a sum of positive squares in 2 ways, for example, as 51466276 + 481636 = 7174^2 + 694^2 .

It is a super-2 number, since 2×51947912² = 5397171122319488, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51947911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3068 + ... + 10644.

Almost surely, 2^51947912 is an apocalyptic number.

It is an amenable number.

51947912 is a deficient number, since it is larger than the sum of its proper divisors (45580948).

51947912 is a wasteful number, since it uses less digits than its factorization.

51947912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8440 (or 8436 counting only the distinct ones).

The product of its digits is 22680, while the sum is 38.

The square root of 51947912 is about 7207.4899930558. The cubic root of 51947912 is about 373.1264464552.

The spelling of 51947912 in words is "fifty-one million, nine hundred forty-seven thousand, nine hundred twelve".