187211045 has 8 divisors (see below), whose sum is σ = 256746624. Its totient is φ = 128373264.

The previous prime is 187211029. The next prime is 187211051. The reversal of 187211045 is 540112781.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 187211045 - 2⁴ = 187211029 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 187210999 and 187211017.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2674409 + ... + 2674478.

It is an arithmetic number, because the mean of its divisors is an integer number (32093328).

Almost surely, 2^187211045 is an apocalyptic number.

It is an amenable number.

187211045 is a deficient number, since it is larger than the sum of its proper divisors (69535579).

187211045 is an equidigital number, since it uses as much as digits as its factorization.

187211045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5348899.

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 187211045 is about 13682.5087246455. The cubic root of 187211045 is about 572.0629515292.

The spelling of 187211045 in words is "one hundred eighty-seven million, two hundred eleven thousand, forty-five".