61999212 has 24 divisors (see below), whose sum is σ = 157816512. Its totient is φ = 18787600.

The previous prime is 61999207. The next prime is 61999243. The reversal of 61999212 is 21299916.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234714 + ... + 234977.

It is an arithmetic number, because the mean of its divisors is an integer number (6575688).

Almost surely, 2^61999212 is an apocalyptic number.

It is an amenable number.

61999212 is an abundant number, since it is smaller than the sum of its proper divisors (95817300).

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

61999212 is a wasteful number, since it uses less digits than its factorization.

61999212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469709 (or 469707 counting only the distinct ones).

The product of its digits is 17496, while the sum is 39.

The square root of 61999212 is about 7873.9578358028. The cubic root of 61999212 is about 395.7874841767.

The spelling of 61999212 in words is "sixty-one million, nine hundred ninety-nine thousand, two hundred twelve".