531157897 has 2 divisors, whose sum is σ = 531157898. Its totient is φ = 531157896.

The previous prime is 531157873. The next prime is 531157931. The reversal of 531157897 is 798751135.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 275925321 + 255232576 = 16611^2 + 15976^2 .

It is a cyclic number.

It is not a de Polignac number, because 531157897 - 2⁷ = 531157769 is a prime.

It is not a weakly prime, because it can be changed into another prime (531157807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265578948 + 265578949.

It is an arithmetic number, because the mean of its divisors is an integer number (265578949).

Almost surely, 2^531157897 is an apocalyptic number.

It is an amenable number.

531157897 is a deficient number, since it is larger than the sum of its proper divisors (1).

531157897 is an equidigital number, since it uses as much as digits as its factorization.

531157897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 264600, while the sum is 46.

The square root of 531157897 is about 23046.8630620308. The cubic root of 531157897 is about 809.8561432275.

The spelling of 531157897 in words is "five hundred thirty-one million, one hundred fifty-seven thousand, eight hundred ninety-seven".