243400102031031 has 16 divisors (see below), whose sum is σ = 354102086764800. Its totient is φ = 147487890552320.

The previous prime is 243400102031029. The next prime is 243400102031039. The reversal of 243400102031031 is 130130201004342.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 243400102031031 - 2¹ = 243400102031029 is a prime.

It is a super-2 number, since 2×243400102031031² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243400102030992 and 243400102031010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243400102031039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 682889130 + ... + 683245463.

It is an arithmetic number, because the mean of its divisors is an integer number (22131380422800).

Almost surely, 2^{243400102031031} is an apocalyptic number.

243400102031031 is a deficient number, since it is larger than the sum of its proper divisors (110701984733769).

243400102031031 is a wasteful number, since it uses less digits than its factorization.

243400102031031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366140006.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 243400102031031 its reverse (130130201004342), we get a palindrome (373530303035373).

The spelling of 243400102031031 in words is "two hundred forty-three trillion, four hundred billion, one hundred two million, thirty-one thousand, thirty-one".