552040021 has 12 divisors (see below), whose sum is σ = 598559328. Its totient is φ = 508903824.

The previous prime is 552039991. The next prime is 552040067. The reversal of 552040021 is 120040255.

It is not a de Polignac number, because 552040021 - 2⁵ = 552039989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (552040081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 164466 + ... + 167788.

It is an arithmetic number, because the mean of its divisors is an integer number (49879944).

Almost surely, 2^552040021 is an apocalyptic number.

It is an amenable number.

552040021 is a deficient number, since it is larger than the sum of its proper divisors (46519307).

552040021 is a wasteful number, since it uses less digits than its factorization.

552040021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4332 (or 4319 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 552040021 is about 23495.5319369449. The cubic root of 552040021 is about 820.3330101921. Note that the first 3 decimals are identical.

Adding to 552040021 its reverse (120040255), we get a palindrome (672080276).

The spelling of 552040021 in words is "five hundred fifty-two million, forty thousand, twenty-one".