253820985 has 32 divisors (see below), whose sum is σ = 462302208. Its totient is φ = 117712320.

The previous prime is 253820971. The next prime is 253820993. The reversal of 253820985 is 589028352.

It is not a de Polignac number, because 253820985 - 2⁶ = 253820921 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29647 + ... + 37236.

It is an arithmetic number, because the mean of its divisors is an integer number (14446944).

Almost surely, 2^253820985 is an apocalyptic number.

It is an amenable number.

253820985 is a deficient number, since it is larger than the sum of its proper divisors (208481223).

253820985 is a wasteful number, since it uses less digits than its factorization.

253820985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66925.

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 253820985 is about 15931.7602605613. The cubic root of 253820985 is about 633.1537377808.

The spelling of 253820985 in words is "two hundred fifty-three million, eight hundred twenty thousand, nine hundred eighty-five".