51443678 has 32 divisors (see below), whose sum is σ = 95437440. Its totient is φ = 20446560.

The previous prime is 51443671. The next prime is 51443681. The reversal of 51443678 is 87634415.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51443671) 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, 701 + ... + 10167.

It is an arithmetic number, because the mean of its divisors is an integer number (2982420).

Almost surely, 2^51443678 is an apocalyptic number.

51443678 is a deficient number, since it is larger than the sum of its proper divisors (43993762).

51443678 is a wasteful number, since it uses less digits than its factorization.

51443678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9512.

The product of its digits is 80640, while the sum is 38.

The square root of 51443678 is about 7172.4248340432. The cubic root of 51443678 is about 371.9152647408.

The spelling of 51443678 in words is "fifty-one million, four hundred forty-three thousand, six hundred seventy-eight".