253415705 has 4 divisors (see below), whose sum is σ = 304098852. Its totient is φ = 202732560.

The previous prime is 253415689. The next prime is 253415707. The reversal of 253415705 is 507514352.

253415705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 173080336 + 80335369 = 13156^2 + 8963^2 .

It is not a de Polignac number, because 253415705 - 2⁴ = 253415689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253415707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25341566 + ... + 25341575.

It is an arithmetic number, because the mean of its divisors is an integer number (76024713).

Almost surely, 2^253415705 is an apocalyptic number.

It is an amenable number.

253415705 is a deficient number, since it is larger than the sum of its proper divisors (50683147).

253415705 is an equidigital number, since it uses as much as digits as its factorization.

253415705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50683146.

The product of its (nonzero) digits is 21000, while the sum is 32.

The square root of 253415705 is about 15919.0359318647. The cubic root of 253415705 is about 632.8165693850.

The spelling of 253415705 in words is "two hundred fifty-three million, four hundred fifteen thousand, seven hundred five".