511260161 has 2 divisors, whose sum is σ = 511260162. Its totient is φ = 511260160.

The previous prime is 511260149. The next prime is 511260181. The reversal of 511260161 is 161062115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 505350400 + 5909761 = 22480^2 + 2431^2 .

It is a cyclic number.

It is not a de Polignac number, because 511260161 - 2⁶ = 511260097 is a prime.

It is a super-2 number, since 2×511260161² = 522773904451491842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (511260121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255630080 + 255630081.

It is an arithmetic number, because the mean of its divisors is an integer number (255630081).

Almost surely, 2^511260161 is an apocalyptic number.

It is an amenable number.

511260161 is a deficient number, since it is larger than the sum of its proper divisors (1).

511260161 is an equidigital number, since it uses as much as digits as its factorization.

511260161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 511260161 is about 22611.0628012042. The cubic root of 511260161 is about 799.6144814366.

The spelling of 511260161 in words is "five hundred eleven million, two hundred sixty thousand, one hundred sixty-one".