61226220 has 48 divisors (see below), whose sum is σ = 187020288. Its totient is φ = 14842560.

The previous prime is 61226219. The next prime is 61226233. The reversal of 61226220 is 2262216.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45724 + ... + 47043.

It is an arithmetic number, because the mean of its divisors is an integer number (3896256).

Almost surely, 2^61226220 is an apocalyptic number.

61226220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61226220 is an abundant number, since it is smaller than the sum of its proper divisors (125794068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61226220 is a wasteful number, since it uses less digits than its factorization.

61226220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92790 (or 92788 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 61226220 is about 7824.7185252889. The cubic root of 61226220 is about 394.1357378860.

Adding to 61226220 its reverse (2262216), we get a palindrome (63488436).

The spelling of 61226220 in words is "sixty-one million, two hundred twenty-six thousand, two hundred twenty".