897227531 has 2 divisors, whose sum is σ = 897227532. Its totient is φ = 897227530.

The previous prime is 897227521. The next prime is 897227561. The reversal of 897227531 is 135722798.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 897227531 - 2¹⁰ = 897226507 is a prime.

It is a super-2 number, since 2×897227531² = 1610034484768711922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (897227521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 448613765 + 448613766.

It is an arithmetic number, because the mean of its divisors is an integer number (448613766).

Almost surely, 2^897227531 is an apocalyptic number.

897227531 is a deficient number, since it is larger than the sum of its proper divisors (1).

897227531 is an equidigital number, since it uses as much as digits as its factorization.

897227531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 44.

The square root of 897227531 is about 29953.7565423771. The cubic root of 897227531 is about 964.4969613694.

The spelling of 897227531 in words is "eight hundred ninety-seven million, two hundred twenty-seven thousand, five hundred thirty-one".