1051986881 has 4 divisors (see below), whose sum is σ = 1147622064. Its totient is φ = 956351700.

The previous prime is 1051986863. The next prime is 1051986883. The reversal of 1051986881 is 1886891501.

1051986881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1051986881 is a prime.

It is a super-2 number, since 2×1051986881² = 2213352795592216322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1051986883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47817575 + ... + 47817596.

It is an arithmetic number, because the mean of its divisors is an integer number (286905516).

Almost surely, 2^1051986881 is an apocalyptic number.

1051986881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1051986881 is a deficient number, since it is larger than the sum of its proper divisors (95635183).

1051986881 is an equidigital number, since it uses as much as digits as its factorization.

1051986881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95635182.

The product of its (nonzero) digits is 138240, while the sum is 47.

The square root of 1051986881 is about 32434.3472417744. The cubic root of 1051986881 is about 1017.0370508345.

The spelling of 1051986881 in words is "one billion, fifty-one million, nine hundred eighty-six thousand, eight hundred eighty-one".