61800213 has 8 divisors (see below), whose sum is σ = 82770688. Its totient is φ = 41014944.

The previous prime is 61800209. The next prime is 61800239. The reversal of 61800213 is 31200816.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61800213 - 2² = 61800209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61800213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61800113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45520 + ... + 46857.

It is an arithmetic number, because the mean of its divisors is an integer number (10346336).

Almost surely, 2^61800213 is an apocalyptic number.

It is an amenable number.

61800213 is a deficient number, since it is larger than the sum of its proper divisors (20970475).

61800213 is a wasteful number, since it uses less digits than its factorization.

61800213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92603.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 61800213 is about 7861.3111501835. The cubic root of 61800213 is about 395.3635770098.

The spelling of 61800213 in words is "sixty-one million, eight hundred thousand, two hundred thirteen".