1553055421 has 8 divisors (see below), whose sum is σ = 1635226400. Its totient is φ = 1470927600.

The previous prime is 1553055419. The next prime is 1553055431. The reversal of 1553055421 is 1245503551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1553055421 - 2¹ = 1553055419 is a prime.

It is a super-2 number, since 2×1553055421² = 4823962281394974482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1553055431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84946 + ... + 101596.

It is an arithmetic number, because the mean of its divisors is an integer number (204403300).

Almost surely, 2^1553055421 is an apocalyptic number.

It is an amenable number.

1553055421 is a deficient number, since it is larger than the sum of its proper divisors (82170979).

1553055421 is a wasteful number, since it uses less digits than its factorization.

1553055421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21579.

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 1553055421 is about 39408.8241514512. The cubic root of 1553055421 is about 1158.0544629822.

Adding to 1553055421 its reverse (1245503551), we get a palindrome (2798558972).

The spelling of 1553055421 in words is "one billion, five hundred fifty-three million, fifty-five thousand, four hundred twenty-one".