253187720 has 32 divisors (see below), whose sum is σ = 570438720. Its totient is φ = 101138880.

The previous prime is 253187717. The next prime is 253187723. The reversal of 253187720 is 27781352.

253187720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (253187717) and next prime (253187723).

It is not an unprimeable number, because it can be changed into a prime (253187723) 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, 29075 + ... + 36765.

It is an arithmetic number, because the mean of its divisors is an integer number (17826210).

Almost surely, 2^253187720 is an apocalyptic number.

253187720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253187720 is an abundant number, since it is smaller than the sum of its proper divisors (317251000).

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

253187720 is a wasteful number, since it uses less digits than its factorization.

253187720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8525 (or 8521 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 253187720 is about 15911.8735540476. The cubic root of 253187720 is about 632.6267416708.

The spelling of 253187720 in words is "two hundred fifty-three million, one hundred eighty-seven thousand, seven hundred twenty".