201551305415531 has 2 divisors, whose sum is σ = 201551305415532. Its totient is φ = 201551305415530.

The previous prime is 201551305415497. The next prime is 201551305415539. The reversal of 201551305415531 is 135514503155102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201551305415531 - 2³⁸ = 201276427508587 is a prime.

It is a super-2 number, since 2×201551305415531² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201551305415539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100775652707765 + 100775652707766.

It is an arithmetic number, because the mean of its divisors is an integer number (100775652707766).

Almost surely, 2^{201551305415531} is an apocalyptic number.

201551305415531 is a deficient number, since it is larger than the sum of its proper divisors (1).

201551305415531 is an equidigital number, since it uses as much as digits as its factorization.

201551305415531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225000, while the sum is 41.

The spelling of 201551305415531 in words is "two hundred one trillion, five hundred fifty-one billion, three hundred five million, four hundred fifteen thousand, five hundred thirty-one".