531966557 has 2 divisors, whose sum is σ = 531966558. Its totient is φ = 531966556.

The previous prime is 531966553. The next prime is 531966569. The reversal of 531966557 is 755669135.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 472584121 + 59382436 = 21739^2 + 7706^2 .

It is a cyclic number.

It is not a de Polignac number, because 531966557 - 2² = 531966553 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531966553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265983278 + 265983279.

It is an arithmetic number, because the mean of its divisors is an integer number (265983279).

Almost surely, 2^531966557 is an apocalyptic number.

It is an amenable number.

531966557 is a deficient number, since it is larger than the sum of its proper divisors (1).

531966557 is an equidigital number, since it uses as much as digits as its factorization.

531966557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 850500, while the sum is 47.

The square root of 531966557 is about 23064.4002089801. The cubic root of 531966557 is about 810.2669226485.

The spelling of 531966557 in words is "five hundred thirty-one million, nine hundred sixty-six thousand, five hundred fifty-seven".