1553551401 has 16 divisors (see below), whose sum is σ = 2099801088. Its totient is φ = 1021597200.

The previous prime is 1553551387. The next prime is 1553551403. The reversal of 1553551401 is 1041553551.

It is not a de Polignac number, because 1553551401 - 2¹⁰ = 1553550377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1553551403) 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 in 15 ways as a sum of consecutive naturals, for example, 53796 + ... + 77466.

It is an arithmetic number, because the mean of its divisors is an integer number (131237568).

Almost surely, 2^1553551401 is an apocalyptic number.

It is an amenable number.

1553551401 is a deficient number, since it is larger than the sum of its proper divisors (546249687).

1553551401 is a wasteful number, since it uses less digits than its factorization.

1553551401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23972.

The product of its (nonzero) digits is 7500, while the sum is 30.

The square root of 1553551401 is about 39415.1164022130. The cubic root of 1553551401 is about 1158.1777276797.

The spelling of 1553551401 in words is "one billion, five hundred fifty-three million, five hundred fifty-one thousand, four hundred one".