253540430 has 32 divisors (see below), whose sum is σ = 536161248. Its totient is φ = 85104000.

The previous prime is 253540429. The next prime is 253540439. The reversal of 253540430 is 34045352.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 253540430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253540439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87221 + ... + 90080.

It is an arithmetic number, because the mean of its divisors is an integer number (16755039).

Almost surely, 2^253540430 is an apocalyptic number.

253540430 is an abundant number, since it is smaller than the sum of its proper divisors (282620818).

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

253540430 is a wasteful number, since it uses less digits than its factorization.

253540430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177332.

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 253540430 is about 15922.9529296547. The cubic root of 253540430 is about 632.9203712933.

Adding to 253540430 its reverse (34045352), we get a palindrome (287585782).

The spelling of 253540430 in words is "two hundred fifty-three million, five hundred forty thousand, four hundred thirty".