213987850 has 12 divisors (see below), whose sum is σ = 398017494. Its totient is φ = 85595120.

The previous prime is 213987847. The next prime is 213987887. The reversal of 213987850 is 58789312.

It can be written as a sum of positive squares in 3 ways, for example, as 93141801 + 120846049 = 9651^2 + 10993^2 .

It is a junction number, because it is equal to n+sod(n) for n = 213987797 and 213987806.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2139829 + ... + 2139928.

Almost surely, 2^213987850 is an apocalyptic number.

213987850 is a deficient number, since it is larger than the sum of its proper divisors (184029644).

213987850 is a wasteful number, since it uses less digits than its factorization.

213987850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4279769 (or 4279764 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 213987850 is about 14628.3235539825. The cubic root of 213987850 is about 598.1310827731.

The spelling of 213987850 in words is "two hundred thirteen million, nine hundred eighty-seven thousand, eight hundred fifty".