253423021530 has 64 divisors (see below), whose sum is σ = 698986506240. Its totient is φ = 57601648704.

The previous prime is 253423021457. The next prime is 253423021547. The reversal of 253423021530 is 35120324352.

It is a super-3 number, since 3×253423021530³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 3333294 + ... + 3408473.

It is an arithmetic number, because the mean of its divisors is an integer number (10921664160).

Almost surely, 2^253423021530 is an apocalyptic number.

253423021530 is an abundant number, since it is smaller than the sum of its proper divisors (445563484710).

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

253423021530 is a wasteful number, since it uses less digits than its factorization.

253423021530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6741963.

The product of its (nonzero) digits is 21600, while the sum is 30.

Adding to 253423021530 its reverse (35120324352), we get a palindrome (288543345882).

The spelling of 253423021530 in words is "two hundred fifty-three billion, four hundred twenty-three million, twenty-one thousand, five hundred thirty".