61939218 has 32 divisors (see below), whose sum is σ = 135677952. Its totient is φ = 18694800.

The previous prime is 61939201. The next prime is 61939223. The reversal of 61939218 is 81293916.

It is a nialpdrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16155 + ... + 19617.

It is an arithmetic number, because the mean of its divisors is an integer number (4239936).

Almost surely, 2^61939218 is an apocalyptic number.

61939218 is an abundant number, since it is smaller than the sum of its proper divisors (73738734).

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

61939218 is a wasteful number, since it uses less digits than its factorization.

61939218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3750.

The product of its digits is 23328, while the sum is 39.

The square root of 61939218 is about 7870.1472667289. The cubic root of 61939218 is about 395.6597807396.

The spelling of 61939218 in words is "sixty-one million, nine hundred thirty-nine thousand, two hundred eighteen".