243251130 has 64 divisors (see below), whose sum is σ = 639498240. Its totient is φ = 58942464.

The previous prime is 243251123. The next prime is 243251201. The reversal of 243251130 is 31152342.

It is a super-2 number, since 2×243251130² = 118342224492553800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243251097 and 243251106.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6567 + ... + 23013.

It is an arithmetic number, because the mean of its divisors is an integer number (9992160).

Almost surely, 2^243251130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243251130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319749120).

243251130 is an abundant number, since it is smaller than the sum of its proper divisors (396247110).

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

243251130 is a wasteful number, since it uses less digits than its factorization.

243251130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16503.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 243251130 is about 15596.5101865770. The cubic root of 243251130 is about 624.2400405799.

The spelling of 243251130 in words is "two hundred forty-three million, two hundred fifty-one thousand, one hundred thirty".