51515089 has 4 divisors (see below), whose sum is σ = 51575920. Its totient is φ = 51454260.

The previous prime is 51515081. The next prime is 51515129. The reversal of 51515089 is 98051515.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51515089 - 2³ = 51515081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51515081) 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 3 ways as a sum of consecutive naturals, for example, 29127 + ... + 30844.

It is an arithmetic number, because the mean of its divisors is an integer number (12893980).

Almost surely, 2^51515089 is an apocalyptic number.

It is an amenable number.

51515089 is a deficient number, since it is larger than the sum of its proper divisors (60831).

51515089 is an equidigital number, since it uses as much as digits as its factorization.

51515089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60830.

The product of its (nonzero) digits is 9000, while the sum is 34.

The square root of 51515089 is about 7177.4012706550. The cubic root of 51515089 is about 372.0872752601.

The spelling of 51515089 in words is "fifty-one million, five hundred fifteen thousand, eighty-nine".