253401220 has 12 divisors (see below), whose sum is σ = 532142604. Its totient is φ = 101360480.

The previous prime is 253401209. The next prime is 253401251. The reversal of 253401220 is 22104352.

It can be written as a sum of positive squares in 2 ways, for example, as 89151364 + 164249856 = 9442^2 + 12816^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6335011 + ... + 6335050.

It is an arithmetic number, because the mean of its divisors is an integer number (44345217).

Almost surely, 2^253401220 is an apocalyptic number.

253401220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253401220 is an abundant number, since it is smaller than the sum of its proper divisors (278741384).

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

253401220 is a wasteful number, since it uses less digits than its factorization.

253401220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12670070 (or 12670068 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 253401220 is about 15918.5809669078. The cubic root of 253401220 is about 632.8045120914.

Adding to 253401220 its reverse (22104352), we get a palindrome (275505572).

The spelling of 253401220 in words is "two hundred fifty-three million, four hundred one thousand, two hundred twenty".