213402225 has 12 divisors (see below), whose sum is σ = 352825136. Its totient is φ = 113814480.

The previous prime is 213402187. The next prime is 213402239. The reversal of 213402225 is 522204312.

It is not a de Polignac number, because 213402225 - 2¹¹ = 213400177 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1422607 + ... + 1422756.

Almost surely, 2^213402225 is an apocalyptic number.

213402225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213402225 is a deficient number, since it is larger than the sum of its proper divisors (139422911).

213402225 is a wasteful number, since it uses less digits than its factorization.

213402225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2845376 (or 2845371 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 213402225 is about 14608.2930214314. The cubic root of 213402225 is about 597.5849450024.

Adding to 213402225 its reverse (522204312), we get a palindrome (735606537).

The spelling of 213402225 in words is "two hundred thirteen million, four hundred two thousand, two hundred twenty-five".