188401131 has 12 divisors (see below), whose sum is σ = 286458120. Its totient is φ = 118990080.

The previous prime is 188401121. The next prime is 188401141. The reversal of 188401131 is 131104881.

It is an interprime number because it is at equal distance from previous prime (188401121) and next prime (188401141).

It is not a de Polignac number, because 188401131 - 2⁶ = 188401067 is a prime.

It is a super-2 number, since 2×188401131² = 70989972324158322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 188401095 and 188401104.

It is not an unprimeable number, because it can be changed into a prime (188401121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 550710 + ... + 551051.

It is an arithmetic number, because the mean of its divisors is an integer number (23871510).

Almost surely, 2^188401131 is an apocalyptic number.

188401131 is a deficient number, since it is larger than the sum of its proper divisors (98056989).

188401131 is a wasteful number, since it uses less digits than its factorization.

188401131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101786 (or 1101783 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 188401131 is about 13725.9291488773. The cubic root of 188401131 is about 573.2725784804.

The spelling of 188401131 in words is "one hundred eighty-eight million, four hundred one thousand, one hundred thirty-one".