190018531 has 4 divisors (see below), whose sum is σ = 190240600. Its totient is φ = 189796464.

The previous prime is 190018519. The next prime is 190018541. The reversal of 190018531 is 135810091.

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 190018531 - 2⁷ = 190018403 is a prime.

It is a super-2 number, since 2×190018531² = 72214084246795922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 190018531.

It is not an unprimeable number, because it can be changed into a prime (190018541) 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 3 ways as a sum of consecutive naturals, for example, 109746 + ... + 111463.

It is an arithmetic number, because the mean of its divisors is an integer number (47560150).

Almost surely, 2^190018531 is an apocalyptic number.

190018531 is a deficient number, since it is larger than the sum of its proper divisors (222069).

190018531 is an equidigital number, since it uses as much as digits as its factorization.

190018531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222068.

The product of its (nonzero) digits is 1080, while the sum is 28.

The square root of 190018531 is about 13784.7209257206. The cubic root of 190018531 is about 574.9083972539.

The spelling of 190018531 in words is "one hundred ninety million, eighteen thousand, five hundred thirty-one".