215331435645 has 16 divisors (see below), whose sum is σ = 362663471040. Its totient is φ = 108799041024.

The previous prime is 215331435643. The next prime is 215331435661. The reversal of 215331435645 is 546534133512.

It is a happy number.

It is not a de Polignac number, because 215331435645 - 2¹ = 215331435643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 215331435597 and 215331435606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215331435643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 377774164 + ... + 377774733.

It is an arithmetic number, because the mean of its divisors is an integer number (22666466940).

Almost surely, 2^215331435645 is an apocalyptic number.

It is an amenable number.

215331435645 is a deficient number, since it is larger than the sum of its proper divisors (147332035395).

215331435645 is a wasteful number, since it uses less digits than its factorization.

215331435645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755548924.

The product of its digits is 648000, while the sum is 42.

The spelling of 215331435645 in words is "two hundred fifteen billion, three hundred thirty-one million, four hundred thirty-five thousand, six hundred forty-five".