188525881 has 2 divisors, whose sum is σ = 188525882. Its totient is φ = 188525880.

The previous prime is 188525867. The next prime is 188525921.

188525881 is nontrivially palindromic in base 10.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128618281 + 59907600 = 11341^2 + 7740^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 188525881 - 2¹³ = 188517689 is a prime.

It is a super-2 number, since 2×188525881² = 71084015613652322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (188525861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94262940 + 94262941.

It is an arithmetic number, because the mean of its divisors is an integer number (94262941).

Almost surely, 2^188525881 is an apocalyptic number.

It is an amenable number.

188525881 is a deficient number, since it is larger than the sum of its proper divisors (1).

188525881 is an equidigital number, since it uses as much as digits as its factorization.

188525881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204800, while the sum is 46.

The square root of 188525881 is about 13730.4727158245. The cubic root of 188525881 is about 573.3990815696.

The spelling of 188525881 in words is "one hundred eighty-eight million, five hundred twenty-five thousand, eight hundred eighty-one".