243130135245541 has 4 divisors (see below), whose sum is σ = 243130260919392. Its totient is φ = 243130009571692.

The previous prime is 243130135245499. The next prime is 243130135245553. The reversal of 243130135245541 is 145542531031342.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 243130135245541 - 2¹⁷ = 243130135114469 is a prime.

It is a super-2 number, since 2×243130135245541² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243130135245241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59888905 + ... + 63819598.

It is an arithmetic number, because the mean of its divisors is an integer number (60782565229848).

Almost surely, 2^{243130135245541} is an apocalyptic number.

It is an amenable number.

243130135245541 is a deficient number, since it is larger than the sum of its proper divisors (125673851).

243130135245541 is a wasteful number, since it uses less digits than its factorization.

243130135245541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125673850.

The product of its (nonzero) digits is 864000, while the sum is 43.

Adding to 243130135245541 its reverse (145542531031342), we get a palindrome (388672666276883).

The spelling of 243130135245541 in words is "two hundred forty-three trillion, one hundred thirty billion, one hundred thirty-five million, two hundred forty-five thousand, five hundred forty-one".