51155542 has 8 divisors (see below), whose sum is σ = 80069616. Its totient is φ = 24465672.

The previous prime is 51155539. The next prime is 51155551. The reversal of 51155542 is 24555115.

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

It is a self number, because there is not a number n which added to its sum of digits gives 51155542.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555993 + ... + 556084.

It is an arithmetic number, because the mean of its divisors is an integer number (10008702).

Almost surely, 2^51155542 is an apocalyptic number.

51155542 is a deficient number, since it is larger than the sum of its proper divisors (28914074).

51155542 is a wasteful number, since it uses less digits than its factorization.

51155542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112102.

The product of its digits is 5000, while the sum is 28.

The square root of 51155542 is about 7152.3102561340. The cubic root of 51155542 is about 371.2195986094.

The spelling of 51155542 in words is "fifty-one million, one hundred fifty-five thousand, five hundred forty-two".