2221231554 has 12 divisors (see below), whose sum is σ = 4812668406. Its totient is φ = 740410512.

The previous prime is 2221231549. The next prime is 2221231583. The reversal of 2221231554 is 4551321222.

It can be written as a sum of positive squares in only one way, i.e., 1542368529 + 678863025 = 39273^2 + 26055^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 61700859 + ... + 61700894.

Almost surely, 2^2221231554 is an apocalyptic number.

2221231554 is an abundant number, since it is smaller than the sum of its proper divisors (2591436852).

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

2221231554 is a wasteful number, since it uses less digits than its factorization.

2221231554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123401761 (or 123401758 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 2221231554 is about 47129.9432844980. The cubic root of 2221231554 is about 1304.7619348181.

Adding to 2221231554 its reverse (4551321222), we get a palindrome (6772552776).

It can be divided in two parts, 22212315 and 54, that added together give a square (22212369 = 4713²).

The spelling of 2221231554 in words is "two billion, two hundred twenty-one million, two hundred thirty-one thousand, five hundred fifty-four".