253811620 has 12 divisors (see below), whose sum is σ = 533004444. Its totient is φ = 101524640.

The previous prime is 253811617. The next prime is 253811627. The reversal of 253811620 is 26118352.

253811620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 117202276 + 136609344 = 10826^2 + 11688^2 .

It is not an unprimeable number, because it can be changed into a prime (253811627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6345271 + ... + 6345310.

It is an arithmetic number, because the mean of its divisors is an integer number (44417037).

Almost surely, 2^253811620 is an apocalyptic number.

253811620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253811620 is an abundant number, since it is smaller than the sum of its proper divisors (279192824).

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

253811620 is a wasteful number, since it uses less digits than its factorization.

253811620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12690590 (or 12690588 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 253811620 is about 15931.4663480798. The cubic root of 253811620 is about 633.1459507208.

Adding to 253811620 its reverse (26118352), we get a palindrome (279929972).

The spelling of 253811620 in words is "two hundred fifty-three million, eight hundred eleven thousand, six hundred twenty".