231515035315045 has 4 divisors (see below), whose sum is σ = 277818042378060. Its totient is φ = 185212028252032.

The previous prime is 231515035315009. The next prime is 231515035315087. The reversal of 231515035315045 is 540513530515132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 91898739022689 + 139616296292356 = 9586383^2 + 11815934^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231515035315045 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231515035314992 and 231515035315010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23151503531500 + ... + 23151503531509.

It is an arithmetic number, because the mean of its divisors is an integer number (69454510594515).

Almost surely, 2^{231515035315045} is an apocalyptic number.

It is an amenable number.

231515035315045 is a deficient number, since it is larger than the sum of its proper divisors (46303007063015).

231515035315045 is an equidigital number, since it uses as much as digits as its factorization.

231515035315045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46303007063014.

The product of its (nonzero) digits is 675000, while the sum is 43.

The spelling of 231515035315045 in words is "two hundred thirty-one trillion, five hundred fifteen billion, thirty-five million, three hundred fifteen thousand, forty-five".