61249218 has 16 divisors (see below), whose sum is σ = 126722880. Its totient is φ = 19712336.

The previous prime is 61249213. The next prime is 61249219. The reversal of 61249218 is 81294216.

61249218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×61249218² = 7502933411223048, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (61249213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175830 + ... + 176177.

It is an arithmetic number, because the mean of its divisors is an integer number (7920180).

Almost surely, 2^61249218 is an apocalyptic number.

61249218 is an abundant number, since it is smaller than the sum of its proper divisors (65473662).

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

61249218 is a wasteful number, since it uses less digits than its factorization.

61249218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352041.

The product of its digits is 6912, while the sum is 33.

The square root of 61249218 is about 7826.1879609424. The cubic root of 61249218 is about 394.1850805751.

The spelling of 61249218 in words is "sixty-one million, two hundred forty-nine thousand, two hundred eighteen".