51531089 has 8 divisors (see below), whose sum is σ = 52267680. Its totient is φ = 50798176.

The previous prime is 51531079. The next prime is 51531113. The reversal of 51531089 is 98013515.

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 51531089 - 2²⁰ = 50482513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51531049) 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 7 ways as a sum of consecutive naturals, for example, 38774 + ... + 40080.

It is an arithmetic number, because the mean of its divisors is an integer number (6533460).

Almost surely, 2^51531089 is an apocalyptic number.

It is an amenable number.

51531089 is a deficient number, since it is larger than the sum of its proper divisors (736591).

51531089 is a wasteful number, since it uses less digits than its factorization.

51531089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1839.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 51531089 is about 7178.5157936721. The cubic root of 51531089 is about 372.1257932961.

The spelling of 51531089 in words is "fifty-one million, five hundred thirty-one thousand, eighty-nine".