51988015 has 8 divisors (see below), whose sum is σ = 63087120. Its totient is φ = 41122752.

The previous prime is 51988007. The next prime is 51988019. The reversal of 51988015 is 51088915.

51988015 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 cyclic number.

It is not a de Polignac number, because 51988015 - 2³ = 51988007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51988019) by changing a digit.

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, 57969 + ... + 58858.

It is an arithmetic number, because the mean of its divisors is an integer number (7885890).

Almost surely, 2^51988015 is an apocalyptic number.

51988015 is a deficient number, since it is larger than the sum of its proper divisors (11099105).

51988015 is a wasteful number, since it uses less digits than its factorization.

51988015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116921.

The product of its (nonzero) digits is 14400, while the sum is 37.

The square root of 51988015 is about 7210.2714928080. The cubic root of 51988015 is about 373.2224377436. Note that the first 3 decimals are identical.

The spelling of 51988015 in words is "fifty-one million, nine hundred eighty-eight thousand, fifteen".