61222881 has 16 divisors (see below), whose sum is σ = 84087360. Its totient is φ = 39598080.

The previous prime is 61222879. The next prime is 61222937. The reversal of 61222881 is 18822216.

It is not a de Polignac number, because 61222881 - 2¹ = 61222879 is a prime.

It is a super-2 number, since 2×61222881² = 7496482315880322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61222081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22450 + ... + 25028.

It is an arithmetic number, because the mean of its divisors is an integer number (5255460).

Almost surely, 2^61222881 is an apocalyptic number.

It is an amenable number.

61222881 is a deficient number, since it is larger than the sum of its proper divisors (22864479).

61222881 is a wasteful number, since it uses less digits than its factorization.

61222881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2816.

The product of its digits is 3072, while the sum is 30.

The square root of 61222881 is about 7824.5051600724. The cubic root of 61222881 is about 394.1285729647.

The spelling of 61222881 in words is "sixty-one million, two hundred twenty-two thousand, eight hundred eighty-one".