61224020 has 48 divisors (see below), whose sum is σ = 151054848. Its totient is φ = 20549760.

The previous prime is 61224019. The next prime is 61224043. The reversal of 61224020 is 2042216.

It is a self number, because there is not a number n which added to its sum of digits gives 61224020.

It is a congruent number.

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, 7844 + ... + 13563.

It is an arithmetic number, because the mean of its divisors is an integer number (3146976).

Almost surely, 2^61224020 is an apocalyptic number.

It is an amenable number.

61224020 is an abundant number, since it is smaller than the sum of its proper divisors (89830828).

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

61224020 is a wasteful number, since it uses less digits than its factorization.

61224020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21440 (or 21438 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 61224020 is about 7824.5779438894. The cubic root of 61224020 is about 394.1310170926.

Adding to 61224020 its reverse (2042216), we get a palindrome (63266236).

The spelling of 61224020 in words is "sixty-one million, two hundred twenty-four thousand, twenty".