11521315465531 has 4 divisors (see below), whose sum is σ = 11521953394864. Its totient is φ = 11520677536200.

The previous prime is 11521315465483. The next prime is 11521315465547. The reversal of 11521315465531 is 13556451312511.

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

It is a cyclic number.

It is not a de Polignac number, because 11521315465531 - 2¹⁹ = 11521314941243 is a prime.

It is a super-2 number, since 2×11521315465531² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11521315465831) 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, 318937575 + ... + 318973696.

It is an arithmetic number, because the mean of its divisors is an integer number (2880488348716).

Almost surely, 2^{11521315465531} is an apocalyptic number.

11521315465531 is a deficient number, since it is larger than the sum of its proper divisors (637929333).

11521315465531 is an equidigital number, since it uses as much as digits as its factorization.

11521315465531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637929332.

The product of its digits is 270000, while the sum is 43.

The spelling of 11521315465531 in words is "eleven trillion, five hundred twenty-one billion, three hundred fifteen million, four hundred sixty-five thousand, five hundred thirty-one".