11522521531 has 8 divisors (see below), whose sum is σ = 12303118080. Its totient is φ = 10765226472.

The previous prime is 11522521489. The next prime is 11522521559. The reversal of 11522521531 is 13512522511.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11522521531 - 2¹³ = 11522513339 is a prime.

It is a super-2 number, since 2×11522521531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11522521531.

It is not an unprimeable number, because it can be changed into a prime (11522521561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5824351 + ... + 5826328.

It is an arithmetic number, because the mean of its divisors is an integer number (1537889760).

Almost surely, 2^11522521531 is an apocalyptic number.

11522521531 is a deficient number, since it is larger than the sum of its proper divisors (780596549).

11522521531 is a wasteful number, since it uses less digits than its factorization.

11522521531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11650745.

The product of its digits is 3000, while the sum is 28.

The spelling of 11522521531 in words is "eleven billion, five hundred twenty-two million, five hundred twenty-one thousand, five hundred thirty-one".