215023254436 has 27 divisors (see below), whose sum is σ = 380148351723. Its totient is φ = 106420527000.

The previous prime is 215023254419. The next prime is 215023254463. The reversal of 215023254436 is 634452320512.

The square root of 215023254436 is 463706.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215023254395 and 215023254404.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 95522311 + ... + 95524561.

Almost surely, 2^215023254436 is an apocalyptic number.

215023254436 is the 463706-th square number.

It is an amenable number.

215023254436 is a deficient number, since it is larger than the sum of its proper divisors (165125097287).

215023254436 is an frugal number, since it uses more digits than its factorization.

215023254436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4712 (or 2356 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 37.

Adding to 215023254436 its reverse (634452320512), we get a palindrome (849475574948).

The spelling of 215023254436 in words is "two hundred fifteen billion, twenty-three million, two hundred fifty-four thousand, four hundred thirty-six".