61220230 has 32 divisors (see below), whose sum is σ = 117612000. Its totient is φ = 22863360.

The previous prime is 61220191. The next prime is 61220233. The reversal of 61220230 is 3202216.

It is a super-2 number, since 2×61220230² = 7495833122505800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61220233) 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, 20896 + ... + 23644.

It is an arithmetic number, because the mean of its divisors is an integer number (3675375).

Almost surely, 2^61220230 is an apocalyptic number.

61220230 is a deficient number, since it is larger than the sum of its proper divisors (56391770).

61220230 is a wasteful number, since it uses less digits than its factorization.

61220230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2904.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 61220230 is about 7824.3357545545. The cubic root of 61220230 is about 394.1228841878.

Adding to 61220230 its reverse (3202216), we get a palindrome (64422446).

The spelling of 61220230 in words is "sixty-one million, two hundred twenty thousand, two hundred thirty".