191155252 has 6 divisors (see below), whose sum is σ = 334521698. Its totient is φ = 95577624.

The previous prime is 191155213. The next prime is 191155291. The reversal of 191155252 is 252551191.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (191155213) and next prime (191155291).

It can be written as a sum of positive squares in only one way, i.e., 115047076 + 76108176 = 10726^2 + 8724^2 .

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 as a sum of consecutive naturals, namely, 23894403 + ... + 23894410.

Almost surely, 2^191155252 is an apocalyptic number.

It is an amenable number.

191155252 is a deficient number, since it is larger than the sum of its proper divisors (143366446).

191155252 is a wasteful number, since it uses less digits than its factorization.

191155252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47788817 (or 47788815 counting only the distinct ones).

The product of its digits is 4500, while the sum is 31.

The square root of 191155252 is about 13825.8906403891. The cubic root of 191155252 is about 576.0525165916.

The spelling of 191155252 in words is "one hundred ninety-one million, one hundred fifty-five thousand, two hundred fifty-two".