521201141557 has 2 divisors, whose sum is σ = 521201141558. Its totient is φ = 521201141556.

The previous prime is 521201141477. The next prime is 521201141561. The reversal of 521201141557 is 755141102125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 454079213316 + 67121928241 = 673854^2 + 259079^2 .

It is a cyclic number.

It is not a de Polignac number, because 521201141557 - 2⁷ = 521201141429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521201141567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260600570778 + 260600570779.

It is an arithmetic number, because the mean of its divisors is an integer number (260600570779).

Almost surely, 2^521201141557 is an apocalyptic number.

It is an amenable number.

521201141557 is a deficient number, since it is larger than the sum of its proper divisors (1).

521201141557 is an equidigital number, since it uses as much as digits as its factorization.

521201141557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14000, while the sum is 34.

The spelling of 521201141557 in words is "five hundred twenty-one billion, two hundred one million, one hundred forty-one thousand, five hundred fifty-seven".