215105454012 has 48 divisors (see below), whose sum is σ = 524589811200. Its totient is φ = 68472410688.

The previous prime is 215105454001. The next prime is 215105454133. The reversal of 215105454012 is 210454501512.

It is a super-2 number, since 2×215105454012² (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 15 ways as a sum of consecutive naturals, for example, 466512 + ... + 804887.

It is an arithmetic number, because the mean of its divisors is an integer number (10928954400).

Almost surely, 2^215105454012 is an apocalyptic number.

It is an amenable number.

215105454012 is an abundant number, since it is smaller than the sum of its proper divisors (309484357188).

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

215105454012 is a wasteful number, since it uses less digits than its factorization.

215105454012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272042 (or 1272040 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

Adding to 215105454012 its reverse (210454501512), we get a palindrome (425559955524).

The spelling of 215105454012 in words is "two hundred fifteen billion, one hundred five million, four hundred fifty-four thousand, twelve".