51947668 has 12 divisors (see below), whose sum is σ = 90983200. Its totient is φ = 25952472.

The previous prime is 51947641. The next prime is 51947669. The reversal of 51947668 is 86674915.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51947669) 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, 955 + ... + 10237.

Almost surely, 2^51947668 is an apocalyptic number.

It is an amenable number.

51947668 is a deficient number, since it is larger than the sum of its proper divisors (39035532).

51947668 is a wasteful number, since it uses less digits than its factorization.

51947668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10686 (or 10684 counting only the distinct ones).

The product of its digits is 362880, while the sum is 46.

The square root of 51947668 is about 7207.4730662001. The cubic root of 51947668 is about 373.1258622611.

The spelling of 51947668 in words is "fifty-one million, nine hundred forty-seven thousand, six hundred sixty-eight".