243105252100 has 36 divisors (see below), whose sum is σ = 530485578000. Its totient is φ = 96698841760.

The previous prime is 243105252043. The next prime is 243105252119. The reversal of 243105252100 is 1252501342.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6772750 + ... + 6808549.

It is an arithmetic number, because the mean of its divisors is an integer number (14735710500).

Almost surely, 2^243105252100 is an apocalyptic number.

243105252100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243105252100 is an abundant number, since it is smaller than the sum of its proper divisors (287380325900).

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

243105252100 is a wasteful number, since it uses less digits than its factorization.

243105252100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13581492 (or 13581485 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 243105252100 its reverse (1252501342), we get a palindrome (244357753442).

The spelling of 243105252100 in words is "two hundred forty-three billion, one hundred five million, two hundred fifty-two thousand, one hundred".