51551542 has 16 divisors (see below), whose sum is σ = 89694720. Its totient is φ = 21763368.

The previous prime is 51551537. The next prime is 51551557. The reversal of 51551542 is 24515515.

51551542 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 2×51551542² = 5315122965155528, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51551542.

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 7 ways as a sum of consecutive naturals, for example, 26542 + ... + 28417.

It is an arithmetic number, because the mean of its divisors is an integer number (5605920).

Almost surely, 2^51551542 is an apocalyptic number.

51551542 is a deficient number, since it is larger than the sum of its proper divisors (38143178).

51551542 is a wasteful number, since it uses less digits than its factorization.

51551542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55035.

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

The square root of 51551542 is about 7179.9402504478. The cubic root of 51551542 is about 372.1750197745.

The spelling of 51551542 in words is "fifty-one million, five hundred fifty-one thousand, five hundred forty-two".