61224620 has 24 divisors (see below), whose sum is σ = 134162784. Its totient is φ = 23424896.

The previous prime is 61224619. The next prime is 61224629. The reversal of 61224620 is 2642216.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (61224629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66089 + ... + 67008.

It is an arithmetic number, because the mean of its divisors is an integer number (5590116).

Almost surely, 2^61224620 is an apocalyptic number.

It is an amenable number.

61224620 is an abundant number, since it is smaller than the sum of its proper divisors (72938164).

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

61224620 is a wasteful number, since it uses less digits than its factorization.

61224620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133129 (or 133127 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 61224620 is about 7824.6162845216. The cubic root of 61224620 is about 394.1323045929.

Adding to 61224620 its reverse (2642216), we get a palindrome (63866836).

The spelling of 61224620 in words is "sixty-one million, two hundred twenty-four thousand, six hundred twenty".