201056151581 has 2 divisors, whose sum is σ = 201056151582. Its totient is φ = 201056151580.

The previous prime is 201056151539. The next prime is 201056151589. The reversal of 201056151581 is 185151650102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122966643556 + 78089508025 = 350666^2 + 279445^2 .

It is a cyclic number.

It is not a de Polignac number, because 201056151581 - 2¹⁰ = 201056150557 is a prime.

It is a super-2 number, since 2×201056151581² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201056151589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100528075790 + 100528075791.

It is an arithmetic number, because the mean of its divisors is an integer number (100528075791).

Almost surely, 2^201056151581 is an apocalyptic number.

It is an amenable number.

201056151581 is a deficient number, since it is larger than the sum of its proper divisors (1).

201056151581 is an equidigital number, since it uses as much as digits as its factorization.

201056151581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12000, while the sum is 35.

The spelling of 201056151581 in words is "two hundred one billion, fifty-six million, one hundred fifty-one thousand, five hundred eighty-one".