61106881 has 8 divisors (see below), whose sum is σ = 67657824. Its totient is φ = 54721920.

The previous prime is 61106879. The next prime is 61106911. The reversal of 61106881 is 18860116.

It is a happy number.

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

It is not a de Polignac number, because 61106881 - 2¹ = 61106879 is a prime.

It is a super-2 number, since 2×61106881² = 7468101811096322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61106861) 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, 40720 + ... + 42193.

It is an arithmetic number, because the mean of its divisors is an integer number (8457228).

Almost surely, 2^61106881 is an apocalyptic number.

It is an amenable number.

61106881 is a deficient number, since it is larger than the sum of its proper divisors (6550943).

61106881 is a wasteful number, since it uses less digits than its factorization.

61106881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82991.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 61106881 is about 7817.0890362078. The cubic root of 61106881 is about 393.8794949569.

Adding to 61106881 its reverse (18860116), we get a palindrome (79966997).

The spelling of 61106881 in words is "sixty-one million, one hundred six thousand, eight hundred eighty-one".