243145526240 has 96 divisors (see below), whose sum is σ = 604857456000. Its totient is φ = 92109961728.

The previous prime is 243145526227. The next prime is 243145526291. The reversal of 243145526240 is 42625541342.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 243145526194 and 243145526203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11112431 + ... + 11134289.

It is an arithmetic number, because the mean of its divisors is an integer number (6300598500).

Almost surely, 2^243145526240 is an apocalyptic number.

243145526240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243145526240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (302428728000).

243145526240 is an abundant number, since it is smaller than the sum of its proper divisors (361711929760).

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

243145526240 is a wasteful number, since it uses less digits than its factorization.

243145526240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25552 (or 25544 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 38.

The spelling of 243145526240 in words is "two hundred forty-three billion, one hundred forty-five million, five hundred twenty-six thousand, two hundred forty".