201532215557 has 2 divisors, whose sum is σ = 201532215558. Its totient is φ = 201532215556.

The previous prime is 201532215527. The next prime is 201532215583. The reversal of 201532215557 is 755512235102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199459598881 + 2072616676 = 446609^2 + 45526^2 .

It is a cyclic number.

It is not a de Polignac number, because 201532215557 - 2⁸ = 201532215301 is a prime.

It is a super-2 number, since 2×201532215557² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 201532215557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201532215527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100766107778 + 100766107779.

It is an arithmetic number, because the mean of its divisors is an integer number (100766107779).

Almost surely, 2^201532215557 is an apocalyptic number.

It is an amenable number.

201532215557 is a deficient number, since it is larger than the sum of its proper divisors (1).

201532215557 is an equidigital number, since it uses as much as digits as its factorization.

201532215557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105000, while the sum is 38.

The spelling of 201532215557 in words is "two hundred one billion, five hundred thirty-two million, two hundred fifteen thousand, five hundred fifty-seven".