1553503145 has 16 divisors (see below), whose sum is σ = 1971914112. Its totient is φ = 1172476800.

The previous prime is 1553503139. The next prime is 1553503199. The reversal of 1553503145 is 5413053551.

It is not a de Polignac number, because 1553503145 - 2¹⁰ = 1553502121 is a prime.

It is a Duffinian 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, 84131 + ... + 100920.

It is an arithmetic number, because the mean of its divisors is an integer number (123244632).

Almost surely, 2^1553503145 is an apocalyptic number.

It is an amenable number.

1553503145 is a deficient number, since it is larger than the sum of its proper divisors (418410967).

1553503145 is a wasteful number, since it uses less digits than its factorization.

1553503145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185152.

The product of its (nonzero) digits is 22500, while the sum is 32.

The square root of 1553503145 is about 39414.5042465334. The cubic root of 1553503145 is about 1158.1657358861.

Adding to 1553503145 its reverse (5413053551), we get a palindrome (6966556696).

The spelling of 1553503145 in words is "one billion, five hundred fifty-three million, five hundred three thousand, one hundred forty-five".