51501489 has 16 divisors (see below), whose sum is σ = 74219712. Its totient is φ = 31578048.

The previous prime is 51501479. The next prime is 51501491. The reversal of 51501489 is 98410515.

51501489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51501489 - 2⁴ = 51501473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51501409) 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 15 ways as a sum of consecutive naturals, for example, 9174 + ... + 13680.

It is an arithmetic number, because the mean of its divisors is an integer number (4638732).

Almost surely, 2^51501489 is an apocalyptic number.

It is an amenable number.

51501489 is a deficient number, since it is larger than the sum of its proper divisors (22718223).

51501489 is a wasteful number, since it uses less digits than its factorization.

51501489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4816.

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 51501489 is about 7176.4537899996. The cubic root of 51501489 is about 372.0545286583.

The spelling of 51501489 in words is "fifty-one million, five hundred one thousand, four hundred eighty-nine".