1255553101 has 4 divisors (see below), whose sum is σ = 1369694304. Its totient is φ = 1141411900.

The previous prime is 1255553081. The next prime is 1255553107. The reversal of 1255553101 is 1013555521.

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 not a de Polignac number, because 1255553101 - 2⁵ = 1255553069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1255553101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255553107) 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, 57070585 + ... + 57070606.

It is an arithmetic number, because the mean of its divisors is an integer number (342423576).

Almost surely, 2^1255553101 is an apocalyptic number.

1255553101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1255553101 is a deficient number, since it is larger than the sum of its proper divisors (114141203).

1255553101 is a wasteful number, since it uses less digits than its factorization.

1255553101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114141202.

The product of its (nonzero) digits is 3750, while the sum is 28.

The square root of 1255553101 is about 35433.7847399907. The cubic root of 1255553101 is about 1078.8101611119.

It can be divided in two parts, 12555 and 53101, that added together give a palindrome (65656).

The spelling of 1255553101 in words is "one billion, two hundred fifty-five million, five hundred fifty-three thousand, one hundred one".