243081972 has 120 divisors (see below), whose sum is σ = 764603840. Its totient is φ = 65784960.

The previous prime is 243081941. The next prime is 243082003. The reversal of 243081972 is 279180342.

It is an interprime number because it is at equal distance from previous prime (243081941) and next prime (243082003).

It is a super-2 number, since 2×243081972² = 118177690222817568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 40272 + ... + 45912.

Almost surely, 2^243081972 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243081972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (382301920).

243081972 is an abundant number, since it is smaller than the sum of its proper divisors (521521868).

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

243081972 is a wasteful number, since it uses less digits than its factorization.

243081972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5683 (or 5672 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 243081972 is about 15591.0862995495. The cubic root of 243081972 is about 624.0953071880.

The spelling of 243081972 in words is "two hundred forty-three million, eighty-one thousand, nine hundred seventy-two".