61471881 has 24 divisors (see below), whose sum is σ = 94764384. Its totient is φ = 38263680.

The previous prime is 61471873. The next prime is 61471889. The reversal of 61471881 is 18817416.

It is an interprime number because it is at equal distance from previous prime (61471873) and next prime (61471889).

It is not a de Polignac number, because 61471881 - 2³ = 61471873 is a prime.

It is a super-2 number, since 2×61471881² = 7557584307356322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61471889) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18510 + ... + 21576.

It is an arithmetic number, because the mean of its divisors is an integer number (3948516).

Almost surely, 2^61471881 is an apocalyptic number.

It is an amenable number.

61471881 is a deficient number, since it is larger than the sum of its proper divisors (33292503).

61471881 is a wasteful number, since it uses less digits than its factorization.

61471881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3221 (or 3218 counting only the distinct ones).

The product of its digits is 10752, while the sum is 36.

The square root of 61471881 is about 7840.4005637467. The cubic root of 61471881 is about 394.6621712259.

The spelling of 61471881 in words is "sixty-one million, four hundred seventy-one thousand, eight hundred eighty-one".