1553320049 has 4 divisors (see below), whose sum is σ = 1553579940. Its totient is φ = 1553060160.

The previous prime is 1553320009. The next prime is 1553320063. The reversal of 1553320049 is 9400233551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 655718449 + 897601600 = 25607^2 + 29960^2 .

It is a cyclic number.

It is not a de Polignac number, because 1553320049 - 2¹⁶ = 1553254513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1553319997 and 1553320024.

It is not an unprimeable number, because it can be changed into a prime (1553320009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120764 + ... + 133005.

It is an arithmetic number, because the mean of its divisors is an integer number (388394985).

Almost surely, 2^1553320049 is an apocalyptic number.

It is an amenable number.

1553320049 is a deficient number, since it is larger than the sum of its proper divisors (259891).

1553320049 is an equidigital number, since it uses as much as digits as its factorization.

1553320049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259890.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 1553320049 is about 39412.1814798420. The cubic root of 1553320049 is about 1158.1202335975.

The spelling of 1553320049 in words is "one billion, five hundred fifty-three million, three hundred twenty thousand, forty-nine".