31553089 has 2 divisors, whose sum is σ = 31553090. Its totient is φ = 31553088.

The previous prime is 31553077. The next prime is 31553161. The reversal of 31553089 is 98035513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23668225 + 7884864 = 4865^2 + 2808^2 .

It is a cyclic number.

It is not a de Polignac number, because 31553089 - 2¹⁹ = 31028801 is a prime.

It is not a weakly prime, because it can be changed into another prime (31553069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15776544 + 15776545.

It is an arithmetic number, because the mean of its divisors is an integer number (15776545).

Almost surely, 2^31553089 is an apocalyptic number.

It is an amenable number.

31553089 is a deficient number, since it is larger than the sum of its proper divisors (1).

31553089 is an equidigital number, since it uses as much as digits as its factorization.

31553089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 31553089 is about 5617.2136331103. The cubic root of 31553089 is about 315.9953031669.

The spelling of 31553089 in words is "thirty-one million, five hundred fifty-three thousand, eighty-nine".