253120520 has 32 divisors (see below), whose sum is σ = 594285120. Its totient is φ = 96845760.

The previous prime is 253120519. The next prime is 253120523. The reversal of 253120520 is 25021352.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 253120492 and 253120501.

It is not an unprimeable number, because it can be changed into a prime (253120523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136646 + ... + 138485.

It is an arithmetic number, because the mean of its divisors is an integer number (18571410).

Almost surely, 2^253120520 is an apocalyptic number.

253120520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253120520 is an abundant number, since it is smaller than the sum of its proper divisors (341164600).

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

253120520 is a wasteful number, since it uses less digits than its factorization.

253120520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275165 (or 275161 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 253120520 is about 15909.7617832575. The cubic root of 253120520 is about 632.5707670251.

Adding to 253120520 its reverse (25021352), we get a palindrome (278141872).

The spelling of 253120520 in words is "two hundred fifty-three million, one hundred twenty thousand, five hundred twenty".