191151253 has 8 divisors (see below), whose sum is σ = 192611736. Its totient is φ = 189696000.

The previous prime is 191151227. The next prime is 191151299. The reversal of 191151253 is 352151191.

It can be written as a sum of positive squares in 4 ways, for example, as 1868689 + 189282564 = 1367^2 + 13758^2 .

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 191151253 - 2⁵ = 191151221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191151223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99603 + ... + 101503.

It is an arithmetic number, because the mean of its divisors is an integer number (24076467).

Almost surely, 2^191151253 is an apocalyptic number.

It is an amenable number.

191151253 is a deficient number, since it is larger than the sum of its proper divisors (1460483).

191151253 is a wasteful number, since it uses less digits than its factorization.

191151253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2615.

The product of its digits is 1350, while the sum is 28.

The square root of 191151253 is about 13825.7460196548. The cubic root of 191151253 is about 576.0484995251.

The spelling of 191151253 in words is "one hundred ninety-one million, one hundred fifty-one thousand, two hundred fifty-three".