13215631326 has 16 divisors (see below), whose sum is σ = 27986043024.
Its totient is φ = 4146080384.
The previous prime is 13215631301. The next prime is 13215631333. The reversal of 13215631326 is 62313651231.
It is a super-2 number, since 2×132156313262 (a number of 21 digits) contains 22 as substring.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64782405 + ... + 64782608.
It is an arithmetic number, because the mean of its divisors is an integer number (1749127689).
Almost surely, 213215631326 is an apocalyptic number.
13215631326 is an abundant number, since it is smaller than the sum of its proper divisors (14770411698).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
13215631326 is a wasteful number, since it uses less digits than its factorization.
13215631326 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 129565035.
The product of its digits is 19440, while the sum is 33.
The spelling of 13215631326 in words is "thirteen billion, two hundred fifteen million, six hundred thirty-one thousand, three hundred twenty-six".