253403136 has 168 divisors, whose sum is σ = 838285344. Its totient is φ = 72253440.

The previous prime is 253403113. The next prime is 253403147. The reversal of 253403136 is 631304352.

It is a happy number.

253403136 is a `hidden beast` number, since 2 + 5 + 340 + 313 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (168).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 515851 + ... + 516341.

Almost surely, 2^253403136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 253403136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (419142672).

253403136 is an abundant number, since it is smaller than the sum of its proper divisors (584882208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

253403136 is an equidigital number, since it uses as much as digits as its factorization.

253403136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530 (or 503 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 253403136 is about 15918.6411480377. The cubic root of 253403136 is about 632.8061069935.

Adding to 253403136 its reverse (631304352), we get a palindrome (884707488).

The spelling of 253403136 in words is "two hundred fifty-three million, four hundred three thousand, one hundred thirty-six".