1055611111 has 8 divisors (see below), whose sum is σ = 1069308000. Its totient is φ = 1041955200.

The previous prime is 1055611103. The next prime is 1055611121. The reversal of 1055611111 is 1111165501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1055611111 - 2³ = 1055611103 is a prime.

It is a super-2 number, since 2×1055611111² = 2228629635333308642, which contains 22 as substring.

It is a Duffinian number.

1055611111 is a modest number, since divided by 11111 gives 10556 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055611121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43411 + ... + 63211.

It is an arithmetic number, because the mean of its divisors is an integer number (133663500).

Almost surely, 2^1055611111 is an apocalyptic number.

1055611111 is a deficient number, since it is larger than the sum of its proper divisors (13696889).

1055611111 is an equidigital number, since it uses as much as digits as its factorization.

1055611111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20489.

The product of its (nonzero) digits is 150, while the sum is 22.

The square root of 1055611111 is about 32490.1694516972. The cubic root of 1055611111 is about 1018.2036532744.

Adding to 1055611111 its reverse (1111165501), we get a palindrome (2166776612).

The spelling of 1055611111 in words is "one billion, fifty-five million, six hundred eleven thousand, one hundred eleven".