215323421225 has 24 divisors (see below), whose sum is σ = 299146145088. Its totient is φ = 152366443200.

The previous prime is 215323421213. The next prime is 215323421273. The reversal of 215323421225 is 522124323512.

It is not a de Polignac number, because 215323421225 - 2¹² = 215323417129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215323421191 and 215323421200.

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, 10570829 + ... + 10591178.

It is an arithmetic number, because the mean of its divisors is an integer number (12464422712).

Almost surely, 2^215323421225 is an apocalyptic number.

215323421225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

215323421225 is a deficient number, since it is larger than the sum of its proper divisors (83822723863).

215323421225 is a wasteful number, since it uses less digits than its factorization.

215323421225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21162065 (or 21162060 counting only the distinct ones).

The product of its digits is 28800, while the sum is 32.

Adding to 215323421225 its reverse (522124323512), we get a palindrome (737447744737).

The spelling of 215323421225 in words is "two hundred fifteen billion, three hundred twenty-three million, four hundred twenty-one thousand, two hundred twenty-five".