61217118 has 24 divisors (see below), whose sum is σ = 132806856. Its totient is φ = 20379600.

The previous prime is 61217113. The next prime is 61217131. The reversal of 61217118 is 81171216.

It is a junction number, because it is equal to n+sod(n) for n = 61217091 and 61217100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61217113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16713 + ... + 20043.

It is an arithmetic number, because the mean of its divisors is an integer number (5533619).

Almost surely, 2^61217118 is an apocalyptic number.

61217118 is an abundant number, since it is smaller than the sum of its proper divisors (71589738).

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

61217118 is a wasteful number, since it uses less digits than its factorization.

61217118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4360 (or 4357 counting only the distinct ones).

The product of its digits is 672, while the sum is 27.

The square root of 61217118 is about 7824.1368853056. The cubic root of 61217118 is about 394.1162059422.

The spelling of 61217118 in words is "sixty-one million, two hundred seventeen thousand, one hundred eighteen".