1554221226 has 16 divisors (see below), whose sum is σ = 3291292224. Its totient is φ = 487598784.

The previous prime is 1554221183. The next prime is 1554221233. The reversal of 1554221226 is 6221224551.

It is a junction number, because it is equal to n+sod(n) for n = 1554221193 and 1554221202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7618630 + ... + 7618833.

It is an arithmetic number, because the mean of its divisors is an integer number (205705764).

Almost surely, 2^1554221226 is an apocalyptic number.

1554221226 is an abundant number, since it is smaller than the sum of its proper divisors (1737070998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1554221226 is a wasteful number, since it uses less digits than its factorization.

1554221226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15237485.

The product of its digits is 9600, while the sum is 30.

The square root of 1554221226 is about 39423.6125437535. The cubic root of 1554221226 is about 1158.3441560169.

Adding to 1554221226 its reverse (6221224551), we get a palindrome (7775445777).

The spelling of 1554221226 in words is "one billion, five hundred fifty-four million, two hundred twenty-one thousand, two hundred twenty-six".