51581089 has 16 divisors (see below), whose sum is σ = 60438400. Its totient is φ = 43110144.

The previous prime is 51581083. The next prime is 51581129. The reversal of 51581089 is 98018515.

It is not a de Polignac number, because 51581089 - 2³ = 51581081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51581081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50617 + ... + 51625.

It is an arithmetic number, because the mean of its divisors is an integer number (3777400).

It is the magic constant of a 469 × 469 magic square.

Almost surely, 2^51581089 is an apocalyptic number.

It is an amenable number.

51581089 is a deficient number, since it is larger than the sum of its proper divisors (8857311).

51581089 is a wasteful number, since it uses less digits than its factorization.

51581089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192.

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

The square root of 51581089 is about 7181.9975633524. The cubic root of 51581089 is about 372.2461107941.

Adding to 51581089 its product of nonzero digits (14400), we get a square (51595489 = 7183²).

The spelling of 51581089 in words is "fifty-one million, five hundred eighty-one thousand, eighty-nine".