2315111450521 has 4 divisors (see below), whose sum is σ = 2315170922932. Its totient is φ = 2315051978112.

The previous prime is 2315111450489. The next prime is 2315111450543. The reversal of 2315111450521 is 1250541115132.

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 2229016154121 + 86095296400 = 1492989^2 + 293420^2 .

It is a cyclic number.

It is not a de Polignac number, because 2315111450521 - 2⁵ = 2315111450489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2315111453521) 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, 29677776 + ... + 29755681.

It is an arithmetic number, because the mean of its divisors is an integer number (578792730733).

Almost surely, 2^{2315111450521} is an apocalyptic number.

It is an amenable number.

2315111450521 is a deficient number, since it is larger than the sum of its proper divisors (59472411).

2315111450521 is an equidigital number, since it uses as much as digits as its factorization.

2315111450521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59472410.

The product of its (nonzero) digits is 6000, while the sum is 31.

Adding to 2315111450521 its reverse (1250541115132), we get a palindrome (3565652565653).

The spelling of 2315111450521 in words is "two trillion, three hundred fifteen billion, one hundred eleven million, four hundred fifty thousand, five hundred twenty-one".