51242178 has 16 divisors (see below), whose sum is σ = 110367936. Its totient is φ = 15766800.

The previous prime is 51242167. The next prime is 51242189. The reversal of 51242178 is 87124215.

It is an interprime number because it is at equal distance from previous prime (51242167) and next prime (51242189).

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, 328398 + ... + 328553.

It is an arithmetic number, because the mean of its divisors is an integer number (6897996).

Almost surely, 2^51242178 is an apocalyptic number.

51242178 is an abundant number, since it is smaller than the sum of its proper divisors (59125758).

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

51242178 is a wasteful number, since it uses less digits than its factorization.

51242178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656969.

The product of its digits is 4480, while the sum is 30.

The square root of 51242178 is about 7158.3641986141. The cubic root of 51242178 is about 371.4290437723.

The spelling of 51242178 in words is "fifty-one million, two hundred forty-two thousand, one hundred seventy-eight".