253397775 has 24 divisors (see below), whose sum is σ = 441003520. Its totient is φ = 128031840.

The previous prime is 253397773. The next prime is 253397777. The reversal of 253397775 is 577793352.

It is an interprime number because it is at equal distance from previous prime (253397773) and next prime (253397777).

It is not a de Polignac number, because 253397775 - 2¹ = 253397773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253397773) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87487 + ... + 90336.

Almost surely, 2^253397775 is an apocalyptic number.

253397775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

253397775 is a deficient number, since it is larger than the sum of its proper divisors (187605745).

253397775 is a wasteful number, since it uses less digits than its factorization.

253397775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177855 (or 177850 counting only the distinct ones).

The product of its digits is 1389150, while the sum is 48.

The square root of 253397775 is about 15918.4727596588. The cubic root of 253397775 is about 632.8016444106.

The spelling of 253397775 in words is "two hundred fifty-three million, three hundred ninety-seven thousand, seven hundred seventy-five".