61220208 has 60 divisors (see below), whose sum is σ = 183980040. Its totient is φ = 17490816.

The previous prime is 61220191. The next prime is 61220233. The reversal of 61220208 is 80202216.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10663 + ... + 15366.

It is an arithmetic number, because the mean of its divisors is an integer number (3066334).

Almost surely, 2^61220208 is an apocalyptic number.

It is an amenable number.

61220208 is an abundant number, since it is smaller than the sum of its proper divisors (122759832).

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

61220208 is a wasteful number, since it uses less digits than its factorization.

61220208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26054 (or 26041 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 61220208 is about 7824.3343486842. The cubic root of 61220208 is about 394.1228369773.

The spelling of 61220208 in words is "sixty-one million, two hundred twenty thousand, two hundred eight".