1555223253 has 4 divisors (see below), whose sum is σ = 2073631008. Its totient is φ = 1036815500.

The previous prime is 1555223251. The next prime is 1555223311. The reversal of 1555223253 is 3523225551.

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 1555223253 - 2¹ = 1555223251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555223251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 259203873 + ... + 259203878.

It is an arithmetic number, because the mean of its divisors is an integer number (518407752).

Almost surely, 2^1555223253 is an apocalyptic number.

It is an amenable number.

1555223253 is a deficient number, since it is larger than the sum of its proper divisors (518407755).

1555223253 is an equidigital number, since it uses as much as digits as its factorization.

1555223253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518407754.

The product of its digits is 45000, while the sum is 33.

The square root of 1555223253 is about 39436.3189585438. The cubic root of 1555223253 is about 1158.5930358099.

The spelling of 1555223253 in words is "one billion, five hundred fifty-five million, two hundred twenty-three thousand, two hundred fifty-three".