253550020240 has 160 divisors (see below), whose sum is σ = 653131589760. Its totient is φ = 90771456000.

The previous prime is 253550020211. The next prime is 253550020253. The reversal of 253550020240 is 42020055352.

It is a super-2 number, since 2×253550020240² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 253550020199 and 253550020208.

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, 15901552 + ... + 15917488.

It is an arithmetic number, because the mean of its divisors is an integer number (4082072436).

Almost surely, 2^253550020240 is an apocalyptic number.

253550020240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 253550020240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (326565794880).

253550020240 is an abundant number, since it is smaller than the sum of its proper divisors (399581569520).

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

253550020240 is a wasteful number, since it uses less digits than its factorization.

253550020240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16241 (or 16235 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 28.

Adding to 253550020240 its reverse (42020055352), we get a palindrome (295570075592).

The spelling of 253550020240 in words is "two hundred fifty-three billion, five hundred fifty million, twenty thousand, two hundred forty".