61865212 has 24 divisors (see below), whose sum is σ = 113121792. Its totient is φ = 29569200.

The previous prime is 61865203. The next prime is 61865231. The reversal of 61865212 is 21256816.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7287 + ... + 13297.

It is an arithmetic number, because the mean of its divisors is an integer number (4713408).

Almost surely, 2^61865212 is an apocalyptic number.

61865212 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

61865212 is a deficient number, since it is larger than the sum of its proper divisors (51256580).

61865212 is a wasteful number, since it uses less digits than its factorization.

61865212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6129 (or 6127 counting only the distinct ones).

The product of its digits is 5760, while the sum is 31.

The square root of 61865212 is about 7865.4441705475. Note that the first 3 decimals coincide. The cubic root of 61865212 is about 395.5021376592.

The spelling of 61865212 in words is "sixty-one million, eight hundred sixty-five thousand, two hundred twelve".