202152551561 has 2 divisors, whose sum is σ = 202152551562. Its totient is φ = 202152551560.

The previous prime is 202152551527. The next prime is 202152551591. The reversal of 202152551561 is 165155251202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156919769161 + 45232782400 = 396131^2 + 212680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202152551561 is a prime.

It is not a weakly prime, because it can be changed into another prime (202152551521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101076275780 + 101076275781.

It is an arithmetic number, because the mean of its divisors is an integer number (101076275781).

Almost surely, 2^202152551561 is an apocalyptic number.

It is an amenable number.

202152551561 is a deficient number, since it is larger than the sum of its proper divisors (1).

202152551561 is an equidigital number, since it uses as much as digits as its factorization.

202152551561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30000, while the sum is 35.

The spelling of 202152551561 in words is "two hundred two billion, one hundred fifty-two million, five hundred fifty-one thousand, five hundred sixty-one".