215381183512 has 16 divisors (see below), whose sum is σ = 440552421000. Its totient is φ = 97900537920.

The previous prime is 215381183491. The next prime is 215381183593.

It is a happy number.

215381183512 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×215381183512² (a number of 23 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 3 ways as a sum of consecutive naturals, for example, 1223756637 + ... + 1223756812.

Almost surely, 2^215381183512 is an apocalyptic number.

215381183512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

215381183512 is an abundant number, since it is smaller than the sum of its proper divisors (225171237488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215381183512 is a wasteful number, since it uses less digits than its factorization.

215381183512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2447513466 (or 2447513462 counting only the distinct ones).

The product of its digits is 57600, while the sum is 40.

It can be divided in two parts, 215381 and 183512, that added together give a palindrome (398893).

The spelling of 215381183512 in words is "two hundred fifteen billion, three hundred eighty-one million, one hundred eighty-three thousand, five hundred twelve".