1553223551 has 16 divisors (see below), whose sum is σ = 1718598816. Its totient is φ = 1392000000.

The previous prime is 1553223527. The next prime is 1553223563.

1553223551 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 1553223551 - 2⁶ = 1553223487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1553229551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264851 + ... + 270651.

It is an arithmetic number, because the mean of its divisors is an integer number (107412426).

Almost surely, 2^1553223551 is an apocalyptic number.

1553223551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1553223551 is a deficient number, since it is larger than the sum of its proper divisors (165375265).

1553223551 is a wasteful number, since it uses less digits than its factorization.

1553223551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6154.

The product of its digits is 22500, while the sum is 32.

The square root of 1553223551 is about 39410.9572454159. The cubic root of 1553223551 is about 1158.0962508601.

The spelling of 1553223551 in words is "one billion, five hundred fifty-three million, two hundred twenty-three thousand, five hundred fifty-one".