920553521 has 2 divisors, whose sum is σ = 920553522. Its totient is φ = 920553520.

The previous prime is 920553499. The next prime is 920553527. The reversal of 920553521 is 125355029.

920553521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 554367025 + 366186496 = 23545^2 + 19136^2 .

It is a cyclic number.

It is not a de Polignac number, because 920553521 - 2⁶ = 920553457 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (920553527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460276760 + 460276761.

It is an arithmetic number, because the mean of its divisors is an integer number (460276761).

Almost surely, 2^920553521 is an apocalyptic number.

It is an amenable number.

920553521 is a deficient number, since it is larger than the sum of its proper divisors (1).

920553521 is an equidigital number, since it uses as much as digits as its factorization.

920553521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13500, while the sum is 32.

The square root of 920553521 is about 30340.6249276445. The cubic root of 920553521 is about 972.7838408599.

It can be divided in two parts, 9205 and 53521, that added together give a palindrome (62726).

The spelling of 920553521 in words is "nine hundred twenty million, five hundred fifty-three thousand, five hundred twenty-one".