253445321100 has 72 divisors (see below), whose sum is σ = 776437211088. Its totient is φ = 63609804800.

The previous prime is 253445321071. The next prime is 253445321119. The reversal of 253445321100 is 1123544352.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24842481 + ... + 24852680.

It is an arithmetic number, because the mean of its divisors is an integer number (10783850154).

Almost surely, 2^253445321100 is an apocalyptic number.

253445321100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253445321100 is an abundant number, since it is smaller than the sum of its proper divisors (522991889988).

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

253445321100 is a wasteful number, since it uses less digits than its factorization.

253445321100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49695195 (or 49695188 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 253445321100 its reverse (1123544352), we get a palindrome (254568865452).

The spelling of 253445321100 in words is "two hundred fifty-three billion, four hundred forty-five million, three hundred twenty-one thousand, one hundred".