1552328891 has 2 divisors, whose sum is σ = 1552328892. Its totient is φ = 1552328890.

The previous prime is 1552328887. The next prime is 1552328933. The reversal of 1552328891 is 1988232551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1552328891 - 2² = 1552328887 is a prime.

It is not a weakly prime, because it can be changed into another prime (1552328851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 776164445 + 776164446.

It is an arithmetic number, because the mean of its divisors is an integer number (776164446).

Almost surely, 2^1552328891 is an apocalyptic number.

1552328891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1552328891 is an equidigital number, since it uses as much as digits as its factorization.

1552328891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172800, while the sum is 44.

The square root of 1552328891 is about 39399.6052137582. The cubic root of 1552328891 is about 1157.8738528700.

The spelling of 1552328891 in words is "one billion, five hundred fifty-two million, three hundred twenty-eight thousand, eight hundred ninety-one".