1828251181 has 2 divisors, whose sum is σ = 1828251182. Its totient is φ = 1828251180.

The previous prime is 1828251169. The next prime is 1828251199. The reversal of 1828251181 is 1811528281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 915607081 + 912644100 = 30259^2 + 30210^2 .

It is an emirp because it is prime and its reverse (1811528281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1828251181 - 2⁵ = 1828251149 is a prime.

It is a super-2 number, since 2×1828251181² = 6685004761655789522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1828251181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1828251151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 914125590 + 914125591.

It is an arithmetic number, because the mean of its divisors is an integer number (914125591).

Almost surely, 2^1828251181 is an apocalyptic number.

It is an amenable number.

1828251181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1828251181 is an equidigital number, since it uses as much as digits as its factorization.

1828251181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10240, while the sum is 37.

The square root of 1828251181 is about 42758.0539898625. The cubic root of 1828251181 is about 1222.7714430778.

It can be divided in two parts, 1828 and 251181, that added together give a square (253009 = 503²).

The spelling of 1828251181 in words is "one billion, eight hundred twenty-eight million, two hundred fifty-one thousand, one hundred eighty-one".