1226555153 has 4 divisors (see below), whose sum is σ = 1227167088. Its totient is φ = 1225943220.

The previous prime is 1226555137. The next prime is 1226555167. The reversal of 1226555153 is 3515556221.

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 1226555153 - 2⁴ = 1226555137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1226555453) 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, 302951 + ... + 306972.

It is an arithmetic number, because the mean of its divisors is an integer number (306791772).

Almost surely, 2^1226555153 is an apocalyptic number.

It is an amenable number.

1226555153 is a deficient number, since it is larger than the sum of its proper divisors (611935).

1226555153 is an equidigital number, since it uses as much as digits as its factorization.

1226555153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611934.

The product of its digits is 45000, while the sum is 35.

The square root of 1226555153 is about 35022.2094248778. The cubic root of 1226555153 is about 1070.4400766420.

The spelling of 1226555153 in words is "one billion, two hundred twenty-six million, five hundred fifty-five thousand, one hundred fifty-three".