525649513 has 2 divisors, whose sum is σ = 525649514. Its totient is φ = 525649512.

The previous prime is 525649511. The next prime is 525649519. The reversal of 525649513 is 315946525.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 430645504 + 95004009 = 20752^2 + 9747^2 .

It is a cyclic number.

It is not a de Polignac number, because 525649513 - 2¹ = 525649511 is a prime.

Together with 525649511, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (525649511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262824756 + 262824757.

It is an arithmetic number, because the mean of its divisors is an integer number (262824757).

Almost surely, 2^525649513 is an apocalyptic number.

It is an amenable number.

525649513 is a deficient number, since it is larger than the sum of its proper divisors (1).

525649513 is an equidigital number, since it uses as much as digits as its factorization.

525649513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 162000, while the sum is 40.

The square root of 525649513 is about 22927.0476293831. The cubic root of 525649513 is about 807.0468661922.

The spelling of 525649513 in words is "five hundred twenty-five million, six hundred forty-nine thousand, five hundred thirteen".