215487210436 has 9 divisors (see below), whose sum is σ = 377104242991. Its totient is φ = 107743141012.

The previous prime is 215487210331. The next prime is 215487210487. The reversal of 215487210436 is 634012784512.

The square root of 215487210436 is 464206.

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

It is a super-2 number, since 2×215487210436² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215487210392 and 215487210401.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 812361 + ... + 1044463.

Almost surely, 2^215487210436 is an apocalyptic number.

215487210436 is the 464206-th square number.

It is an amenable number.

215487210436 is a deficient number, since it is larger than the sum of its proper divisors (161617032555).

215487210436 is an frugal number, since it uses more digits than its factorization.

215487210436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464210 (or 232105 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 43.

Adding to 215487210436 its reverse (634012784512), we get a palindrome (849499994948).

The spelling of 215487210436 in words is "two hundred fifteen billion, four hundred eighty-seven million, two hundred ten thousand, four hundred thirty-six".