51881488 has 40 divisors (see below), whose sum is σ = 103272408. Its totient is φ = 25239552.

The previous prime is 51881483. The next prime is 51881497. The reversal of 51881488 is 88418815.

It can be written as a sum of positive squares in 4 ways, for example, as 501264 + 51380224 = 708^2 + 7168^2 .

It is not an unprimeable number, because it can be changed into a prime (51881483) 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, 163506 + ... + 163822.

Almost surely, 2^51881488 is an apocalyptic number.

It is an amenable number.

51881488 is a deficient number, since it is larger than the sum of its proper divisors (51390920).

51881488 is a wasteful number, since it uses less digits than its factorization.

51881488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571 (or 565 counting only the distinct ones).

The product of its digits is 81920, while the sum is 43.

The square root of 51881488 is about 7202.8805348971. The cubic root of 51881488 is about 372.9673439918.

The spelling of 51881488 in words is "fifty-one million, eight hundred eighty-one thousand, four hundred eighty-eight".