61211850 has 96 divisors (see below), whose sum is σ = 175572096. Its totient is φ = 13824000.

The previous prime is 61211827. The next prime is 61211861. The reversal of 61211850 is 5811216.

It is a self number, because there is not a number n which added to its sum of digits gives 61211850.

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 47 ways as a sum of consecutive naturals, for example, 101550 + ... + 102150.

It is an arithmetic number, because the mean of its divisors is an integer number (1828876).

Almost surely, 2^61211850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61211850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87786048).

61211850 is an abundant number, since it is smaller than the sum of its proper divisors (114360246).

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

61211850 is a wasteful number, since it uses less digits than its factorization.

61211850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720 (or 715 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 61211850 is about 7823.8002275109. The cubic root of 61211850 is about 394.1049004784.

The spelling of 61211850 in words is "sixty-one million, two hundred eleven thousand, eight hundred fifty".