1554221135 has 16 divisors (see below), whose sum is σ = 1897994592. Its totient is φ = 1221475200.

The previous prime is 1554221093. The next prime is 1554221167. The reversal of 1554221135 is 5311224551.

It is not a de Polignac number, because 1554221135 - 2²⁰ = 1553172559 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1554221098 and 1554221107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 286145 + ... + 291525.

It is an arithmetic number, because the mean of its divisors is an integer number (118624662).

Almost surely, 2^1554221135 is an apocalyptic number.

1554221135 is a deficient number, since it is larger than the sum of its proper divisors (343773457).

1554221135 is an equidigital number, since it uses as much as digits as its factorization.

1554221135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6394.

The product of its digits is 6000, while the sum is 29.

The square root of 1554221135 is about 39423.6113896228. The cubic root of 1554221135 is about 1158.3441334098.

Adding to 1554221135 its reverse (5311224551), we get a palindrome (6865445686).

The spelling of 1554221135 in words is "one billion, five hundred fifty-four million, two hundred twenty-one thousand, one hundred thirty-five".