1553513421 has 8 divisors (see below), whose sum is σ = 2091860064. Its totient is φ = 1025421200.

The previous prime is 1553513347. The next prime is 1553513497. The reversal of 1553513421 is 1243153551.

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 1553513421 - 2⁷ = 1553513293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1553523421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2563251 + ... + 2563856.

It is an arithmetic number, because the mean of its divisors is an integer number (261482508).

Almost surely, 2^1553513421 is an apocalyptic number.

It is an amenable number.

1553513421 is a deficient number, since it is larger than the sum of its proper divisors (538346643).

1553513421 is a wasteful number, since it uses less digits than its factorization.

1553513421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5127211.

The product of its digits is 9000, while the sum is 30.

The square root of 1553513421 is about 39414.6346044207. The cubic root of 1553513421 is about 1158.1682895307.

Adding to 1553513421 its reverse (1243153551), we get a palindrome (2796666972).

The spelling of 1553513421 in words is "one billion, five hundred fifty-three million, five hundred thirteen thousand, four hundred twenty-one".