51442868 has 24 divisors (see below), whose sum is σ = 94533600. Its totient is φ = 24460128.

The previous prime is 51442843. The next prime is 51442871. The reversal of 51442868 is 86824415.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4463 + ... + 11081.

It is an arithmetic number, because the mean of its divisors is an integer number (3938900).

Almost surely, 2^51442868 is an apocalyptic number.

51442868 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

51442868 is a deficient number, since it is larger than the sum of its proper divisors (43090732).

51442868 is a wasteful number, since it uses less digits than its factorization.

51442868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6719 (or 6717 counting only the distinct ones).

The product of its digits is 61440, while the sum is 38.

The square root of 51442868 is about 7172.3683675617. The cubic root of 51442868 is about 371.9133127488.

The spelling of 51442868 in words is "fifty-one million, four hundred forty-two thousand, eight hundred sixty-eight".