201551305415497 has 2 divisors, whose sum is σ = 201551305415498. Its totient is φ = 201551305415496.

The previous prime is 201551305415491. The next prime is 201551305415531. The reversal of 201551305415497 is 794514503155102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185869895494921 + 15681409920576 = 13633411^2 + 3959976^2 .

It is a cyclic number.

It is not a de Polignac number, because 201551305415497 - 2³⁵ = 201516945677129 is a prime.

It is not a weakly prime, because it can be changed into another prime (201551305415491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100775652707748 + 100775652707749.

It is an arithmetic number, because the mean of its divisors is an integer number (100775652707749).

Almost surely, 2^{201551305415497} is an apocalyptic number.

It is an amenable number.

201551305415497 is a deficient number, since it is larger than the sum of its proper divisors (1).

201551305415497 is an equidigital number, since it uses as much as digits as its factorization.

201551305415497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780000, while the sum is 52.

The spelling of 201551305415497 in words is "two hundred one trillion, five hundred fifty-one billion, three hundred five million, four hundred fifteen thousand, four hundred ninety-seven".