253217322440 has 32 divisors (see below), whose sum is σ = 570336898680. Its totient is φ = 101180631552.

The previous prime is 253217322439. The next prime is 253217322473. The reversal of 253217322440 is 44223712352.

It can be written as a sum of positive squares in 4 ways, for example, as 246486432676 + 6730889764 = 496474^2 + 82042^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 253217322440.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3283199 + ... + 3359438.

Almost surely, 2^253217322440 is an apocalyptic number.

253217322440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253217322440 is an abundant number, since it is smaller than the sum of its proper divisors (317119576240).

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

253217322440 is a wasteful number, since it uses less digits than its factorization.

253217322440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6643601 (or 6643597 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 35.

The spelling of 253217322440 in words is "two hundred fifty-three billion, two hundred seventeen million, three hundred twenty-two thousand, four hundred forty".