215395643442 has 48 divisors (see below), whose sum is σ = 509339757312. Its totient is φ = 60532728480.

The previous prime is 215395643429. The next prime is 215395643467. The reversal of 215395643442 is 244346593512.

It is a junction number, because it is equal to n+sod(n) for n = 215395643391 and 215395643400.

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, 5987298 + ... + 6023165.

It is an arithmetic number, because the mean of its divisors is an integer number (10611244944).

Almost surely, 2^215395643442 is an apocalyptic number.

215395643442 is an abundant number, since it is smaller than the sum of its proper divisors (293944113870).

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

215395643442 is a wasteful number, since it uses less digits than its factorization.

215395643442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12010543 (or 12010536 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 48.

The spelling of 215395643442 in words is "two hundred fifteen billion, three hundred ninety-five million, six hundred forty-three thousand, four hundred forty-two".