531415649 has 2 divisors, whose sum is σ = 531415650. Its totient is φ = 531415648.

The previous prime is 531415603. The next prime is 531415681. The reversal of 531415649 is 946514135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 460317025 + 71098624 = 21455^2 + 8432^2 .

It is a cyclic number.

It is not a de Polignac number, because 531415649 - 2²⁰ = 530367073 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (531415849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265707824 + 265707825.

It is an arithmetic number, because the mean of its divisors is an integer number (265707825).

Almost surely, 2^531415649 is an apocalyptic number.

It is an amenable number.

531415649 is a deficient number, since it is larger than the sum of its proper divisors (1).

531415649 is an equidigital number, since it uses as much as digits as its factorization.

531415649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 38.

The square root of 531415649 is about 23052.4542944998. The cubic root of 531415649 is about 809.9871201529.

The spelling of 531415649 in words is "five hundred thirty-one million, four hundred fifteen thousand, six hundred forty-nine".