243400504331 has 8 divisors (see below), whose sum is σ = 251889771600. Its totient is φ = 234917646880.

The previous prime is 243400504313. The next prime is 243400504339. The reversal of 243400504331 is 133405004342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243400504331 - 2²⁶ = 243333395467 is a prime.

It is a super-2 number, since 2×243400504331² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243400504294 and 243400504303.

It is not an unprimeable number, because it can be changed into a prime (243400504339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1525121 + ... + 1677138.

It is an arithmetic number, because the mean of its divisors is an integer number (31486221450).

Almost surely, 2^243400504331 is an apocalyptic number.

243400504331 is a deficient number, since it is larger than the sum of its proper divisors (8489267269).

243400504331 is a wasteful number, since it uses less digits than its factorization.

243400504331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3204909.

The product of its (nonzero) digits is 17280, while the sum is 29.

Adding to 243400504331 its reverse (133405004342), we get a palindrome (376805508673).

The spelling of 243400504331 in words is "two hundred forty-three billion, four hundred million, five hundred four thousand, three hundred thirty-one".