253621133 has 2 divisors, whose sum is σ = 253621134. Its totient is φ = 253621132.

The previous prime is 253621129. The next prime is 253621171. The reversal of 253621133 is 331126352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 250842244 + 2778889 = 15838^2 + 1667^2 .

It is a cyclic number.

It is not a de Polignac number, because 253621133 - 2² = 253621129 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253621183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126810566 + 126810567.

It is an arithmetic number, because the mean of its divisors is an integer number (126810567).

Almost surely, 2^253621133 is an apocalyptic number.

It is an amenable number.

253621133 is a deficient number, since it is larger than the sum of its proper divisors (1).

253621133 is an equidigital number, since it uses as much as digits as its factorization.

253621133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 26.

The square root of 253621133 is about 15925.4868999350. The cubic root of 253621133 is about 632.9875179205.

Adding to 253621133 its reverse (331126352), we get a palindrome (584747485).

The spelling of 253621133 in words is "two hundred fifty-three million, six hundred twenty-one thousand, one hundred thirty-three".