253956191 has 8 divisors (see below), whose sum is σ = 256260480. Its totient is φ = 251662752.

The previous prime is 253956187. The next prime is 253956203. The reversal of 253956191 is 191659352.

It is a happy number.

253956191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 253956191 - 2² = 253956187 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 (253956121) 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, 48581 + ... + 53553.

It is an arithmetic number, because the mean of its divisors is an integer number (32032560).

Almost surely, 2^253956191 is an apocalyptic number.

253956191 is a deficient number, since it is larger than the sum of its proper divisors (2304289).

253956191 is a wasteful number, since it uses less digits than its factorization.

253956191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5425.

The product of its digits is 72900, while the sum is 41.

The square root of 253956191 is about 15936.0029806724. The cubic root of 253956191 is about 633.2661411326.

The spelling of 253956191 in words is "two hundred fifty-three million, nine hundred fifty-six thousand, one hundred ninety-one".