1552325521 has 2 divisors, whose sum is σ = 1552325522. Its totient is φ = 1552325520.

The previous prime is 1552325507. The next prime is 1552325531. The reversal of 1552325521 is 1255232551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1479479296 + 72846225 = 38464^2 + 8535^2 .

It is an emirp because it is prime and its reverse (1255232551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1552325521 - 2⁹ = 1552325009 is a prime.

It is not a weakly prime, because it can be changed into another prime (1552325531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 776162760 + 776162761.

It is an arithmetic number, because the mean of its divisors is an integer number (776162761).

Almost surely, 2^1552325521 is an apocalyptic number.

It is an amenable number.

1552325521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1552325521 is an equidigital number, since it uses as much as digits as its factorization.

1552325521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15000, while the sum is 31.

The square root of 1552325521 is about 39399.5624468090. The cubic root of 1552325521 is about 1157.8730149810.

The spelling of 1552325521 in words is "one billion, five hundred fifty-two million, three hundred twenty-five thousand, five hundred twenty-one".