253500030 has 144 divisors (see below), whose sum is σ = 795478320. Its totient is φ = 57915648.

The previous prime is 253500029. The next prime is 253500041. The reversal of 253500030 is 30005352.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 253499976 and 253500012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 118006 + ... + 120134.

It is an arithmetic number, because the mean of its divisors is an integer number (5524155).

Almost surely, 2^253500030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 253500030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (397739160).

253500030 is an abundant number, since it is smaller than the sum of its proper divisors (541978290).

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

253500030 is a wasteful number, since it uses less digits than its factorization.

253500030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2165 (or 2146 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 18.

The square root of 253500030 is about 15921.6842702021. The cubic root of 253500030 is about 632.8867522748.

Adding to 253500030 its reverse (30005352), we get a palindrome (283505382).

The spelling of 253500030 in words is "two hundred fifty-three million, five hundred thousand, thirty".