215041400452 has 6 divisors (see below), whose sum is σ = 376322450798. Its totient is φ = 107520700224.

The previous prime is 215041400407. The next prime is 215041400557. The reversal of 215041400452 is 254004140512.

It can be written as a sum of positive squares in only one way, i.e., 199599858756 + 15441541696 = 446766^2 + 124264^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 215041400452.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26880175053 + ... + 26880175060.

Almost surely, 2^215041400452 is an apocalyptic number.

It is an amenable number.

215041400452 is a deficient number, since it is larger than the sum of its proper divisors (161281050346).

215041400452 is a wasteful number, since it uses less digits than its factorization.

215041400452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53760350117 (or 53760350115 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

Adding to 215041400452 its reverse (254004140512), we get a palindrome (469045540964).

The spelling of 215041400452 in words is "two hundred fifteen billion, forty-one million, four hundred thousand, four hundred fifty-two".