61220030 has 16 divisors (see below), whose sum is σ = 110379024. Its totient is φ = 24447360.

The previous prime is 61220021. The next prime is 61220041. The reversal of 61220030 is 3002216.

It is a junction number, because it is equal to n+sod(n) for n = 61219987 and 61220014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1670 + ... + 11190.

It is an arithmetic number, because the mean of its divisors is an integer number (6898689).

Almost surely, 2^61220030 is an apocalyptic number.

61220030 is a deficient number, since it is larger than the sum of its proper divisors (49158994).

61220030 is a wasteful number, since it uses less digits than its factorization.

61220030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10171.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 61220030 is about 7824.3229739064. The cubic root of 61220030 is about 394.1224550014.

Adding to 61220030 its reverse (3002216), we get a palindrome (64222246).

The spelling of 61220030 in words is "sixty-one million, two hundred twenty thousand, thirty".