1226815552 has 14 divisors (see below), whose sum is σ = 2434462238. Its totient is φ = 613407744.

The previous prime is 1226815547. The next prime is 1226815559. The reversal of 1226815552 is 2555186221.

It can be written as a sum of positive squares in only one way, i.e., 685601856 + 541213696 = 26184^2 + 23264^2 .

It is not an unprimeable number, because it can be changed into a prime (1226815559) by changing a digit.

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 as a sum of consecutive naturals, namely, 9584433 + ... + 9584560.

Almost surely, 2^1226815552 is an apocalyptic number.

It is an amenable number.

1226815552 is a deficient number, since it is larger than the sum of its proper divisors (1207646686).

1226815552 is an equidigital number, since it uses as much as digits as its factorization.

1226815552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19169005 (or 19168995 counting only the distinct ones).

The product of its digits is 48000, while the sum is 37.

The square root of 1226815552 is about 35025.9268542604. The cubic root of 1226815552 is about 1070.5158231481.

The spelling of 1226815552 in words is "one billion, two hundred twenty-six million, eight hundred fifteen thousand, five hundred fifty-two".