53881000 has 32 divisors (see below), whose sum is σ = 126083880. Its totient is φ = 21552000.

The previous prime is 53880997. The next prime is 53881001. The reversal of 53881000 is 18835.

It can be written as a sum of positive squares in 4 ways, for example, as 16695396 + 37185604 = 4086^2 + 6098^2 .

It is a super-2 number, since 2×53881000² = 5806324322000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (53881001) 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, 25941 + ... + 27940.

Almost surely, 2^53881000 is an apocalyptic number.

53881000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

53881000 is an abundant number, since it is smaller than the sum of its proper divisors (72202880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53881000 is a wasteful number, since it uses less digits than its factorization.

53881000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53902 (or 53888 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 53881000 is about 7340.3678381945. The cubic root of 53881000 is about 377.6984614978.

Adding to 53881000 its reverse (18835), we get a palindrome (53899835).

The spelling of 53881000 in words is "fifty-three million, eight hundred eighty-one thousand".