1881252115 has 4 divisors (see below), whose sum is σ = 2257502544. Its totient is φ = 1505001688.

The previous prime is 1881252101. The next prime is 1881252151. The reversal of 1881252115 is 5112521881.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1881252115 - 2⁵ = 1881252083 is a prime.

It is a super-3 number, since 3×1881252115³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188125207 + ... + 188125216.

It is an arithmetic number, because the mean of its divisors is an integer number (564375636).

Almost surely, 2^1881252115 is an apocalyptic number.

1881252115 is a deficient number, since it is larger than the sum of its proper divisors (376250429).

1881252115 is an equidigital number, since it uses as much as digits as its factorization.

1881252115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376250428.

The product of its digits is 6400, while the sum is 34.

The square root of 1881252115 is about 43373.4033135515. The cubic root of 1881252115 is about 1234.4750980643.

Adding to 1881252115 its reverse (5112521881), we get a palindrome (6993773996).

The spelling of 1881252115 in words is "one billion, eight hundred eighty-one million, two hundred fifty-two thousand, one hundred fifteen".