253081660 has 48 divisors (see below), whose sum is σ = 585690336. Its totient is φ = 91268352.

The previous prime is 253081657. The next prime is 253081667. The reversal of 253081660 is 66180352.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253081667) 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, 139 + ... + 22498.

It is an arithmetic number, because the mean of its divisors is an integer number (12201882).

Almost surely, 2^253081660 is an apocalyptic number.

253081660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 253081660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292845168).

253081660 is an abundant number, since it is smaller than the sum of its proper divisors (332608676).

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

253081660 is a wasteful number, since it uses less digits than its factorization.

253081660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22702 (or 22700 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 253081660 is about 15908.5404735947. The cubic root of 253081660 is about 632.5383938324.

The spelling of 253081660 in words is "two hundred fifty-three million, eighty-one thousand, six hundred sixty".