552621421 has 8 divisors (see below), whose sum is σ = 607261824. Its totient is φ = 498714720.

The previous prime is 552621413. The next prime is 552621439. The reversal of 552621421 is 124126255.

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 552621421 - 2³ = 552621413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 552621421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (552621721) 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, 181845 + ... + 184858.

It is an arithmetic number, because the mean of its divisors is an integer number (75907728).

Almost surely, 2^552621421 is an apocalyptic number.

It is an amenable number.

552621421 is a deficient number, since it is larger than the sum of its proper divisors (54640403).

552621421 is a wasteful number, since it uses less digits than its factorization.

552621421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366851.

The product of its digits is 4800, while the sum is 28.

The square root of 552621421 is about 23507.9012461768. The cubic root of 552621421 is about 820.6208964902.

Adding to 552621421 its reverse (124126255), we get a palindrome (676747676).

The spelling of 552621421 in words is "five hundred fifty-two million, six hundred twenty-one thousand, four hundred twenty-one".