213402345 has 16 divisors (see below), whose sum is σ = 367708992. Its totient is φ = 105059520.

The previous prime is 213402337. The next prime is 213402353. The reversal of 213402345 is 543204312.

It is an interprime number because it is at equal distance from previous prime (213402337) and next prime (213402353).

It is not a de Polignac number, because 213402345 - 2³ = 213402337 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 546991 + ... + 547380.

It is an arithmetic number, because the mean of its divisors is an integer number (22981812).

Almost surely, 2^213402345 is an apocalyptic number.

It is an amenable number.

213402345 is a deficient number, since it is larger than the sum of its proper divisors (154306647).

213402345 is a wasteful number, since it uses less digits than its factorization.

213402345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094392.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 213402345 is about 14608.2971286868. The cubic root of 213402345 is about 597.5850570134.

Adding to 213402345 its reverse (543204312), we get a palindrome (756606657).

The spelling of 213402345 in words is "two hundred thirteen million, four hundred two thousand, three hundred forty-five".