525255557 has 2 divisors, whose sum is σ = 525255558. Its totient is φ = 525255556.

The previous prime is 525255547. The next prime is 525255559. The reversal of 525255557 is 755552525.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 487482241 + 37773316 = 22079^2 + 6146^2 .

It is a cyclic number.

It is not a de Polignac number, because 525255557 - 2⁴ = 525255541 is a prime.

Together with 525255559, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (525255559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262627778 + 262627779.

It is an arithmetic number, because the mean of its divisors is an integer number (262627779).

Almost surely, 2^525255557 is an apocalyptic number.

It is an amenable number.

525255557 is a deficient number, since it is larger than the sum of its proper divisors (1).

525255557 is an equidigital number, since it uses as much as digits as its factorization.

525255557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 437500, while the sum is 41.

The square root of 525255557 is about 22918.4545072306. The cubic root of 525255557 is about 806.8451979646.

The spelling of 525255557 in words is "five hundred twenty-five million, two hundred fifty-five thousand, five hundred fifty-seven".