51178542 has 32 divisors (see below), whose sum is σ = 107626752. Its totient is φ = 16192704.

The previous prime is 51178513. The next prime is 51178559. The reversal of 51178542 is 24587115.

51178542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51178542² = 5238486322491528, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17553 + ... + 20259.

It is an arithmetic number, because the mean of its divisors is an integer number (3363336).

Almost surely, 2^51178542 is an apocalyptic number.

51178542 is an abundant number, since it is smaller than the sum of its proper divisors (56448210).

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

51178542 is a wasteful number, since it uses less digits than its factorization.

51178542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2872.

The product of its digits is 11200, while the sum is 33.

The square root of 51178542 is about 7153.9179475306. The cubic root of 51178542 is about 371.2752248502.

The spelling of 51178542 in words is "fifty-one million, one hundred seventy-eight thousand, five hundred forty-two".