215203456450 has 48 divisors (see below), whose sum is σ = 424577959200. Its totient is φ = 80873688320.

The previous prime is 215203456441. The next prime is 215203456511. The reversal of 215203456450 is 54654302512.

It is a super-3 number, since 3×215203456450³ (a number of 35 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 253701 + ... + 703399.

It is an arithmetic number, because the mean of its divisors is an integer number (8845374150).

Almost surely, 2^215203456450 is an apocalyptic number.

215203456450 is a deficient number, since it is larger than the sum of its proper divisors (209374502750).

215203456450 is a wasteful number, since it uses less digits than its factorization.

215203456450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450291 (or 450286 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 37.

Adding to 215203456450 its reverse (54654302512), we get a palindrome (269857758962).

The spelling of 215203456450 in words is "two hundred fifteen billion, two hundred three million, four hundred fifty-six thousand, four hundred fifty".