215225343 has 24 divisors (see below), whose sum is σ = 332806656. Its totient is φ = 138850200.

The previous prime is 215225341. The next prime is 215225347. The reversal of 215225343 is 343522512.

It is a happy number.

It is not a de Polignac number, because 215225343 - 2¹ = 215225341 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215225341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6753 + ... + 21818.

It is an arithmetic number, because the mean of its divisors is an integer number (13866944).

Almost surely, 2^215225343 is an apocalyptic number.

215225343 is a deficient number, since it is larger than the sum of its proper divisors (117581313).

215225343 is an equidigital number, since it uses as much as digits as its factorization.

215225343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28617 (or 28605 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 215225343 is about 14670.5604187434. The cubic root of 215225343 is about 599.2818658151.

Adding to 215225343 its reverse (343522512), we get a palindrome (558747855).

It can be divided in two parts, 2152 and 25343, that added together give a triangular number (27495 = T₂₃₄).

The spelling of 215225343 in words is "two hundred fifteen million, two hundred twenty-five thousand, three hundred forty-three".