1225220324 has 6 divisors (see below), whose sum is σ = 2144135574. Its totient is φ = 612610160.

The previous prime is 1225220323. The next prime is 1225220341. The reversal of 1225220324 is 4230225221.

It can be written as a sum of positive squares in only one way, i.e., 1219266724 + 5953600 = 34918^2 + 2440^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1225220324.

It is not an unprimeable number, because it can be changed into a prime (1225220323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153152537 + ... + 153152544.

It is an arithmetic number, because the mean of its divisors is an integer number (357355929).

Almost surely, 2^1225220324 is an apocalyptic number.

It is an amenable number.

1225220324 is a deficient number, since it is larger than the sum of its proper divisors (918915250).

1225220324 is a wasteful number, since it uses less digits than its factorization.

1225220324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306305085 (or 306305083 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 1225220324 is about 35003.1473442032. The cubic root of 1225220324 is about 1070.0516247256.

Adding to 1225220324 its reverse (4230225221), we get a palindrome (5455445545).

The spelling of 1225220324 in words is "one billion, two hundred twenty-five million, two hundred twenty thousand, three hundred twenty-four".