51057489 has 16 divisors (see below), whose sum is σ = 77920128. Its totient is φ = 29131392.

The previous prime is 51057481. The next prime is 51057509. The reversal of 51057489 is 98475015.

It is not a de Polignac number, because 51057489 - 2³ = 51057481 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51057481) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 16579 + ... + 19415.

It is an arithmetic number, because the mean of its divisors is an integer number (4870008).

Almost surely, 2^51057489 is an apocalyptic number.

It is an amenable number.

51057489 is a deficient number, since it is larger than the sum of its proper divisors (26862639).

51057489 is a wasteful number, since it uses less digits than its factorization.

51057489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3704.

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 51057489 is about 7145.4523299788. The cubic root of 51057489 is about 370.9822670329.

The spelling of 51057489 in words is "fifty-one million, fifty-seven thousand, four hundred eighty-nine".