553302421 has 32 divisors (see below), whose sum is σ = 683020800. Its totient is φ = 437944320.

The previous prime is 553302389. The next prime is 553302461. The reversal of 553302421 is 124203355.

It is a 8-Lehmer number, since φ(553302421) divides (553302421-1)⁸.

It is a cyclic number.

It is not a de Polignac number, because 553302421 - 2⁵ = 553302389 is a prime.

It is a super-2 number, since 2×553302421² = 612287138168922482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (553302461) 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, 719125 + ... + 719893.

It is an arithmetic number, because the mean of its divisors is an integer number (21344400).

Almost surely, 2^553302421 is an apocalyptic number.

It is an amenable number.

553302421 is a deficient number, since it is larger than the sum of its proper divisors (129718379).

553302421 is a wasteful number, since it uses less digits than its factorization.

553302421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 553302421 is about 23522.3812782635. The cubic root of 553302421 is about 820.9578441188.

Adding to 553302421 its reverse (124203355), we get a palindrome (677505776).

The spelling of 553302421 in words is "five hundred fifty-three million, three hundred two thousand, four hundred twenty-one".