61223340 has 24 divisors (see below), whose sum is σ = 171425520. Its totient is φ = 16326208.

The previous prime is 61223329. The next prime is 61223381. The reversal of 61223340 is 4332216.

It is a happy number.

61223340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 510135 + ... + 510254.

It is an arithmetic number, because the mean of its divisors is an integer number (7142730).

Almost surely, 2^61223340 is an apocalyptic number.

61223340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61223340 is an abundant number, since it is smaller than the sum of its proper divisors (110202180).

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

61223340 is a wasteful number, since it uses less digits than its factorization.

61223340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020401 (or 1020399 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 61223340 is about 7824.5344909458. The cubic root of 61223340 is about 394.1295579154.

Adding to 61223340 its reverse (4332216), we get a palindrome (65555556).

The spelling of 61223340 in words is "sixty-one million, two hundred twenty-three thousand, three hundred forty".