213624436 has 12 divisors (see below), whose sum is σ = 375741828. Its totient is φ = 106269632.

The previous prime is 213624401. The next prime is 213624443. The reversal of 213624436 is 634426312.

It can be written as a sum of positive squares in 2 ways, for example, as 166564836 + 47059600 = 12906^2 + 6860^2 .

It is a junction number, because it is equal to n+sod(n) for n = 213624398 and 213624407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134761 + ... + 136336.

It is an arithmetic number, because the mean of its divisors is an integer number (31311819).

Almost surely, 2^213624436 is an apocalyptic number.

It is an amenable number.

213624436 is a deficient number, since it is larger than the sum of its proper divisors (162117392).

213624436 is a wasteful number, since it uses less digits than its factorization.

213624436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271298 (or 271296 counting only the distinct ones).

The product of its digits is 20736, while the sum is 31.

The square root of 213624436 is about 14615.8966881954. The cubic root of 213624436 is about 597.7922903639.

The spelling of 213624436 in words is "two hundred thirteen million, six hundred twenty-four thousand, four hundred thirty-six".