553072921 has 2 divisors, whose sum is σ = 553072922. Its totient is φ = 553072920.

The previous prime is 553072913. The next prime is 553072931. The reversal of 553072921 is 129270355.

553072921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 551545225 + 1527696 = 23485^2 + 1236^2 .

It is a cyclic number.

It is not a de Polignac number, because 553072921 - 2³ = 553072913 is a prime.

It is not a weakly prime, because it can be changed into another prime (553072901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 276536460 + 276536461.

It is an arithmetic number, because the mean of its divisors is an integer number (276536461).

Almost surely, 2^553072921 is an apocalyptic number.

It is an amenable number.

553072921 is a deficient number, since it is larger than the sum of its proper divisors (1).

553072921 is an equidigital number, since it uses as much as digits as its factorization.

553072921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 553072921 is about 23517.5024396725. The cubic root of 553072921 is about 820.8443221859.

The spelling of 553072921 in words is "five hundred fifty-three million, seventy-two thousand, nine hundred twenty-one".