213145436 has 24 divisors (see below), whose sum is σ = 434337120. Its totient is φ = 89623872.

The previous prime is 213145403. The next prime is 213145441. The reversal of 213145436 is 634541312.

It is a junction number, because it is equal to n+sod(n) for n = 213145399 and 213145408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70331 + ... + 73298.

It is an arithmetic number, because the mean of its divisors is an integer number (18097380).

Almost surely, 2^213145436 is an apocalyptic number.

It is an amenable number.

213145436 is an abundant number, since it is smaller than the sum of its proper divisors (221191684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213145436 is a wasteful number, since it uses less digits than its factorization.

213145436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143693 (or 143691 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

The square root of 213145436 is about 14599.5012243569. The cubic root of 213145436 is about 597.3451555122.

Adding to 213145436 its reverse (634541312), we get a palindrome (847686748).

The spelling of 213145436 in words is "two hundred thirteen million, one hundred forty-five thousand, four hundred thirty-six".