61109211 has 8 divisors (see below), whose sum is σ = 81516544. Its totient is φ = 40720680.

The previous prime is 61109207. The next prime is 61109233. The reversal of 61109211 is 11290116.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61109211 - 2² = 61109207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61109201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7170 + ... + 13176.

It is an arithmetic number, because the mean of its divisors is an integer number (10189568).

Almost surely, 2^61109211 is an apocalyptic number.

61109211 is a deficient number, since it is larger than the sum of its proper divisors (20407333).

61109211 is a wasteful number, since it uses less digits than its factorization.

61109211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9401.

The product of its (nonzero) digits is 108, while the sum is 21.

The square root of 61109211 is about 7817.2380672460. The cubic root of 61109211 is about 393.8845010901.

Adding to 61109211 its reverse (11290116), we get a palindrome (72399327).

The spelling of 61109211 in words is "sixty-one million, one hundred nine thousand, two hundred eleven".