1553043145 has 16 divisors (see below), whose sum is σ = 1947911040. Its totient is φ = 1186441344.

The previous prime is 1553043139. The next prime is 1553043157. The reversal of 1553043145 is 5413403551.

It is a cyclic number.

It is not a de Polignac number, because 1553043145 - 2¹¹ = 1553041097 is a prime.

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, 60277 + ... + 82093.

It is an arithmetic number, because the mean of its divisors is an integer number (121744440).

Almost surely, 2^1553043145 is an apocalyptic number.

It is an amenable number.

1553043145 is a deficient number, since it is larger than the sum of its proper divisors (394867895).

1553043145 is a wasteful number, since it uses less digits than its factorization.

1553043145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22464.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 1553043145 is about 39408.6683992240. The cubic root of 1553043145 is about 1158.0514117251.

Adding to 1553043145 its reverse (5413403551), we get a palindrome (6966446696).

The spelling of 1553043145 in words is "one billion, five hundred fifty-three million, forty-three thousand, one hundred forty-five".