253215693 has 8 divisors (see below), whose sum is σ = 375134400. Its totient is φ = 168810444.

The previous prime is 253215689. The next prime is 253215701. The reversal of 253215693 is 396512352.

It is not a de Polignac number, because 253215693 - 2² = 253215689 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253215643) 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 7 ways as a sum of consecutive naturals, for example, 4689153 + ... + 4689206.

It is an arithmetic number, because the mean of its divisors is an integer number (46891800).

Almost surely, 2^253215693 is an apocalyptic number.

It is an amenable number.

253215693 is a deficient number, since it is larger than the sum of its proper divisors (121918707).

253215693 is an equidigital number, since it uses as much as digits as its factorization.

253215693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9378368 (or 9378362 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

The square root of 253215693 is about 15912.7525274542. The cubic root of 253215693 is about 632.6500390305.

It can be divided in two parts, 2532 and 15693, that added together give a square (18225 = 135²).

The spelling of 253215693 in words is "two hundred fifty-three million, two hundred fifteen thousand, six hundred ninety-three".