243131521058 has 4 divisors (see below), whose sum is σ = 364697281590. Its totient is φ = 121565760528.

The previous prime is 243131521057. The next prime is 243131521081. The reversal of 243131521058 is 850125131342.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 237532441129 + 5599079929 = 487373^2 + 74827^2 .

It is a super-2 number, since 2×243131521058² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243131521051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60782880263 + ... + 60782880266.

Almost surely, 2^243131521058 is an apocalyptic number.

243131521058 is a deficient number, since it is larger than the sum of its proper divisors (121565760532).

243131521058 is a wasteful number, since it uses less digits than its factorization.

243131521058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121565760531.

The product of its (nonzero) digits is 28800, while the sum is 35.

The spelling of 243131521058 in words is "two hundred forty-three billion, one hundred thirty-one million, five hundred twenty-one thousand, fifty-eight".