552009421 has 4 divisors (see below), whose sum is σ = 552121344. Its totient is φ = 551897500.

The previous prime is 552009391. The next prime is 552009427. The reversal of 552009421 is 124900255.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 552009421 - 2¹⁵ = 551976653 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 552009421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (552009427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48205 + ... + 58546.

It is an arithmetic number, because the mean of its divisors is an integer number (138030336).

Almost surely, 2^552009421 is an apocalyptic number.

It is an amenable number.

552009421 is a deficient number, since it is larger than the sum of its proper divisors (111923).

552009421 is a wasteful number, since it uses less digits than its factorization.

552009421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111922.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 552009421 is about 23494.8807402804. The cubic root of 552009421 is about 820.3178526836.

Adding to 552009421 its reverse (124900255), we get a palindrome (676909676).

The spelling of 552009421 in words is "five hundred fifty-two million, nine thousand, four hundred twenty-one".