253405101 has 4 divisors (see below), whose sum is σ = 337873472. Its totient is φ = 168936732.

The previous prime is 253405073. The next prime is 253405121. The reversal of 253405101 is 101504352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 253405101 - 2⁵ = 253405069 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253405121) 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 3 ways as a sum of consecutive naturals, for example, 42234181 + ... + 42234186.

It is an arithmetic number, because the mean of its divisors is an integer number (84468368).

Almost surely, 2^253405101 is an apocalyptic number.

It is an amenable number.

253405101 is a deficient number, since it is larger than the sum of its proper divisors (84468371).

253405101 is an equidigital number, since it uses as much as digits as its factorization.

253405101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84468370.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 253405101 is about 15918.7028680103. The cubic root of 253405101 is about 632.8077426754.

Adding to 253405101 its reverse (101504352), we get a palindrome (354909453).

The spelling of 253405101 in words is "two hundred fifty-three million, four hundred five thousand, one hundred one".