1881631053 has 20 divisors (see below), whose sum is σ = 2812124700. Its totient is φ = 1253843712.

The previous prime is 1881631033. The next prime is 1881631067. The reversal of 1881631053 is 3501361881.

1881631053 is a `hidden beast` number, since 18 + 8 + 1 + 631 + 0 + 5 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 761925609 + 1119705444 = 27603^2 + 33462^2 .

It is not a de Polignac number, because 1881631053 - 2⁸ = 1881630797 is a prime.

It is a super-2 number, since 2×1881631053² = 7081070839227777618, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1881630999 and 1881631017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1881631033) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 242173 + ... + 249821.

It is an arithmetic number, because the mean of its divisors is an integer number (140606235).

Almost surely, 2^1881631053 is an apocalyptic number.

It is an amenable number.

1881631053 is a deficient number, since it is larger than the sum of its proper divisors (930493647).

1881631053 is an equidigital number, since it uses as much as digits as its factorization.

1881631053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10698 (or 10689 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 1881631053 is about 43377.7714157839. The cubic root of 1881631053 is about 1234.5579787011.

The spelling of 1881631053 in words is "one billion, eight hundred eighty-one million, six hundred thirty-one thousand, fifty-three".