61132881 has 4 divisors (see below), whose sum is σ = 81510512. Its totient is φ = 40755252.

The previous prime is 61132871. The next prime is 61132889. The reversal of 61132881 is 18823116.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 61132881 - 2⁵ = 61132849 is a prime.

It is a super-2 number, since 2×61132881² = 7474458278720322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61132889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10188811 + ... + 10188816.

It is an arithmetic number, because the mean of its divisors is an integer number (20377628).

Almost surely, 2^61132881 is an apocalyptic number.

It is an amenable number.

61132881 is a deficient number, since it is larger than the sum of its proper divisors (20377631).

61132881 is a wasteful number, since it uses less digits than its factorization.

61132881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20377630.

The product of its digits is 2304, while the sum is 30.

The square root of 61132881 is about 7818.7518824938. The cubic root of 61132881 is about 393.9353501765.

Adding to 61132881 its reverse (18823116), we get a palindrome (79955997).

The spelling of 61132881 in words is "sixty-one million, one hundred thirty-two thousand, eight hundred eighty-one".