1255551011 has 16 divisors (see below), whose sum is σ = 1477012320. Its totient is φ = 1052209920.

The previous prime is 1255550987. The next prime is 1255551041. The reversal of 1255551011 is 1101555521.

It is a cyclic number.

It is not a de Polignac number, because 1255551011 - 2²⁶ = 1188442147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1255551041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110261 + ... + 121113.

It is an arithmetic number, because the mean of its divisors is an integer number (92313270).

Almost surely, 2^1255551011 is an apocalyptic number.

1255551011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1255551011 is a deficient number, since it is larger than the sum of its proper divisors (221461309).

1255551011 is a wasteful number, since it uses less digits than its factorization.

1255551011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11686.

The product of its (nonzero) digits is 1250, while the sum is 26.

The square root of 1255551011 is about 35433.7552483504. The cubic root of 1255551011 is about 1078.8095625140.

It can be divided in two parts, 12555510 and 11, that added together give a palindrome (12555521).

The spelling of 1255551011 in words is "one billion, two hundred fifty-five million, five hundred fifty-one thousand, eleven".