51156542 has 8 divisors (see below), whose sum is σ = 76800000. Its totient is φ = 25556544.

The previous prime is 51156527. The next prime is 51156559. The reversal of 51156542 is 24565115.

It is a happy number.

51156542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 7742 + ... + 12737.

It is an arithmetic number, because the mean of its divisors is an integer number (9600000).

Almost surely, 2^51156542 is an apocalyptic number.

51156542 is a deficient number, since it is larger than the sum of its proper divisors (25643458).

51156542 is a wasteful number, since it uses less digits than its factorization.

51156542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21730.

The product of its digits is 6000, while the sum is 29.

The square root of 51156542 is about 7152.3801632743. The cubic root of 51156542 is about 371.2220174883. Note that the first 3 decimals are identical.

The spelling of 51156542 in words is "fifty-one million, one hundred fifty-six thousand, five hundred forty-two".