1553421441 has 32 divisors (see below), whose sum is σ = 2436295680. Its totient is φ = 867988800.

The previous prime is 1553421433. The next prime is 1553421473. The reversal of 1553421441 is 1441243551.

It is not a de Polignac number, because 1553421441 - 2³ = 1553421433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1553421399 and 1553421408.

It is not an unprimeable number, because it can be changed into a prime (1553421421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 466380 + ... + 469698.

It is an arithmetic number, because the mean of its divisors is an integer number (76134240).

Almost surely, 2^1553421441 is an apocalyptic number.

1553421441 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1553421441 is a deficient number, since it is larger than the sum of its proper divisors (882874239).

1553421441 is a wasteful number, since it uses less digits than its factorization.

1553421441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4437.

The product of its digits is 9600, while the sum is 30.

The square root of 1553421441 is about 39413.4677616675. The cubic root of 1553421441 is about 1158.1454315753.

Adding to 1553421441 its reverse (1441243551), we get a palindrome (2994664992).

The spelling of 1553421441 in words is "one billion, five hundred fifty-three million, four hundred twenty-one thousand, four hundred forty-one".