552405021 has 64 divisors (see below), whose sum is σ = 930009600. Its totient is φ = 284368896.

The previous prime is 552405019. The next prime is 552405059. The reversal of 552405021 is 120504255.

It is a happy number.

It is not a de Polignac number, because 552405021 - 2¹ = 552405019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 552404982 and 552405000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (552405001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2370721 + ... + 2370953.

It is an arithmetic number, because the mean of its divisors is an integer number (14531400).

Almost surely, 2^552405021 is an apocalyptic number.

552405021 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

552405021 is a deficient number, since it is larger than the sum of its proper divisors (377604579).

552405021 is a wasteful number, since it uses less digits than its factorization.

552405021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 552405021 is about 23503.2980877153. The cubic root of 552405021 is about 820.5137673659.

Adding to 552405021 its reverse (120504255), we get a palindrome (672909276).

The spelling of 552405021 in words is "five hundred fifty-two million, four hundred five thousand, twenty-one".